0:00:33 > 0:00:36All right, I've got ya, I've got ya, it's all right, I've got...
0:00:36 > 0:00:38oh, dear, yeah.
0:00:38 > 0:00:41That was a lab rat, I sent him into the tank to fetch my keys.
0:00:41 > 0:00:44I think I dropped 'em in there, and...oh, hang on...
0:00:44 > 0:00:48oh, no, it's all right, I've got them, they're here. Thank goodness!
0:00:48 > 0:00:50Never mind! Hello and welcome to my Blast Lab.
0:00:52 > 0:00:53Got the keys back.
0:00:53 > 0:00:56If you like fluffy animals, butterflies and rainbows,
0:00:56 > 0:00:59you're watching the wrong programme.
0:00:59 > 0:01:01If you like gunge, experiments and explosions
0:01:01 > 0:01:03then you are in the right place.
0:01:03 > 0:01:05In a moment, two teams of young scientists
0:01:05 > 0:01:09are about to partake in some noisy, gungey and fun scientific challenges
0:01:09 > 0:01:11to try and win great prizes. Coming up,
0:01:11 > 0:01:15the petrol powered professor. In fact, now 2.0, it is Oliver.
0:01:21 > 0:01:25In Mini Science we shall be learning about attraction,
0:01:25 > 0:01:27with a science teacher who hates me.
0:01:32 > 0:01:34Yeah, yeah, well done.
0:01:34 > 0:01:37Meanwhile, I may have regrets over letting my Lab Rats
0:01:37 > 0:01:40take charge of doing the weekly supermarket shop.
0:01:43 > 0:01:47This week's Messy Messy Mess Test will involve my soon-to-be-illegal,
0:01:47 > 0:01:51cat-firing device, it's my amazing catapult for the gungey bungee.
0:01:54 > 0:01:57Now, most top secret labs have elaborate swipe cards,
0:01:57 > 0:02:00iris recognition and fingerprint machines to allow access.
0:02:00 > 0:02:02There's no need for any of that rubbish here.
0:02:02 > 0:02:05That's because I have my Ninja Nan.
0:02:12 > 0:02:16She must be practising her Ninja invisibility techniques, brilliant.
0:02:16 > 0:02:17If you look carefully
0:02:17 > 0:02:20you can see a sort of shimmer in the middle of the room...
0:02:20 > 0:02:23..oh, no, hang on, she's just been making a pot of tea. My mistake.
0:02:23 > 0:02:25Now she's got herself settled in,
0:02:25 > 0:02:29let's have a look at who's trying to get into my lab today.
0:02:34 > 0:02:37Yeah, everybody's very excited. Oh, look, here's the Red Team.
0:02:37 > 0:02:39We don't know, you could be anybody.
0:02:39 > 0:02:43- For security reasons, your names, please.- Emma.- Abigail.- Connor.
0:02:43 > 0:02:46Emma, Abigail and Connor, yeah, most definitely.
0:02:46 > 0:02:51- What talent will you use to prove you're the Red Team?- A funky dance.
0:02:51 > 0:02:53That's what it says here. Go on then.
0:02:53 > 0:02:57Big fish, little fish, cardboard box, big fish, little fish, cardboard box.
0:02:57 > 0:03:00Robot, robot, ee, ee, ee.
0:03:00 > 0:03:02Technically, that was an irritating dance,
0:03:02 > 0:03:06but we'll let you in, we'll say it's funky, into the lab, come on then.
0:03:08 > 0:03:10What on Earth was that?
0:03:10 > 0:03:12All right then, so you say you're the real Red Team.
0:03:12 > 0:03:15One final security check before I let you into the lab.
0:03:15 > 0:03:18We agreed a password with the real Red Team,
0:03:18 > 0:03:21if that's you, you'd know what it is. So what is it?
0:03:21 > 0:03:23- Sharks.- Yes, that's what I've got written down.
0:03:23 > 0:03:25Why sharks? Got a pet shark?
0:03:25 > 0:03:27I've got a massive phobia of them.
0:03:27 > 0:03:29- Have you?- Once, I cried cos my mum said,
0:03:29 > 0:03:32"imagine if you were in a tank full of them?".
0:03:32 > 0:03:34That'd be terrible. Aagghh, shark!
0:03:34 > 0:03:37No, it's not, you're all right, it's just the audience there.
0:03:37 > 0:03:41You are the Red Team, go and get settled in ready for the first game.
0:03:41 > 0:03:44Right, that's one team, we need another, we need a Yellow Team.
0:03:44 > 0:03:46These three say it's them.
0:03:51 > 0:03:53Yeah, it's all well and good getting excited,
0:03:53 > 0:03:57you could be three impostors who've just found three yellow lab coats.
0:03:57 > 0:03:59We need to check you out through security. Names?
0:03:59 > 0:04:01- Ryan.- George.- Charlie.
0:04:01 > 0:04:04Ryan, George, Charlie, that's what I've got here.
0:04:04 > 0:04:07Charlie, your name's next to talent, What are you going to do?
0:04:07 > 0:04:09I can do basketball tricks.
0:04:09 > 0:04:11OK, do some basketball tricks.
0:04:11 > 0:04:14Oh, yeah, bouncing, oh, yeah, oh, OK.
0:04:14 > 0:04:16He's doing the spinning on the finger thing,
0:04:16 > 0:04:19fair enough, I'll let you in.
0:04:21 > 0:04:24Hello, Yellows, now we agreed a password with the real,
0:04:24 > 0:04:27- genuine Yellow Team. What d'you think it is?- Eyelid.
0:04:27 > 0:04:29Yeah, that's what I've got written down. Why?
0:04:29 > 0:04:30I was playing football
0:04:30 > 0:04:34and I collided heads with my friend and I split my eyelid.
0:04:34 > 0:04:37Ow! Fair enough, it's a wounded story, that's pretty impressive.
0:04:37 > 0:04:42I'll believe you're the Yellow Team. Go and get ready for the first game.
0:04:42 > 0:04:43There's your Yellow Team.
0:04:43 > 0:04:46And now it's time for the car the Government won't let on the road,
0:04:46 > 0:04:48not because he isn't roadworthy,
0:04:48 > 0:04:51but because he knows all their top-secret information
0:04:51 > 0:04:54and to let him out would be a risk to national security...
0:04:54 > 0:04:57and he isn't taxed. It is, of course, Oliver.
0:05:16 > 0:05:18Oliver, please join us.
0:05:18 > 0:05:21Get him docked into Factnav, get him hooked up,
0:05:21 > 0:05:24there you go, systems up and running. Oh, yes.
0:05:24 > 0:05:27He's a wonderful little car, but I've made him even better
0:05:27 > 0:05:30because I upgraded him with the very latest Factnav 2.0,
0:05:30 > 0:05:35an unbelievable system full of just millions of fascinating facts.
0:05:35 > 0:05:36The only thing is, when I fitted it,
0:05:36 > 0:05:39you see, there was already the stereo in the dashboard,
0:05:39 > 0:05:43and so there was only so much room and it wouldn't quite go in,
0:05:43 > 0:05:46and because I really love my music, I broke a bit off the Factnav
0:05:46 > 0:05:49to put it in, and now it doesn't really work properly.
0:05:49 > 0:05:51So teams, I'm going to need you to tell me
0:05:51 > 0:05:54whether the science facts I give you are true or false.
0:05:54 > 0:05:57If they then turn out to be true, Oliver will do this.
0:05:57 > 0:05:59OLIVER TOOTS
0:05:59 > 0:06:03Or, if they're false, he'll let us know by doing this.
0:06:03 > 0:06:05OLIVER PARPS
0:06:05 > 0:06:07OK, simple enough, here's how we play the game.
0:06:07 > 0:06:10Three lights on each side, three for each team, now red.
0:06:10 > 0:06:14Every time you get a question right we'll turn one light green.
0:06:14 > 0:06:17But if you answer a question incorrectly,
0:06:17 > 0:06:19not only do we not turn your light green,
0:06:19 > 0:06:22we'll turn one of the other team's lights green.
0:06:22 > 0:06:25The first team to light all three lights green will win the game,
0:06:25 > 0:06:27they'll take a point and we move on.
0:06:27 > 0:06:30Know what you've got to do? The first question
0:06:30 > 0:06:32is a "nearest to" question.
0:06:32 > 0:06:34The Northern Line of the London Underground
0:06:34 > 0:06:37has one of the longest tunnels in the world.
0:06:37 > 0:06:41How long is that tunnel in miles? Have a chat, have a think.
0:06:41 > 0:06:45Oh, Reds, let's get something written down.
0:06:45 > 0:06:49- Time's up.- OK, both teams have got an answer written down in miles.
0:06:49 > 0:06:52Yellows, what've you got? 100 miles
0:06:52 > 0:06:55Reds, what've you got? 220 miles.
0:06:55 > 0:06:59The actual answer is 17.3 miles,
0:06:59 > 0:07:04- which means the Yellows are closest. They get the green light.- Yes!
0:07:04 > 0:07:09OK, that means, Yellows, you get the first "true or false" question.
0:07:09 > 0:07:16A spacesuit weighs approximately 127kg on the ground,
0:07:16 > 0:07:18is that true or false?
0:07:18 > 0:07:21- False. - False, that's your answer as a team.
0:07:21 > 0:07:25Yellows think it's false. Oliver, is that true or false?
0:07:25 > 0:07:27- OLIVER TOOTS - It's true.
0:07:27 > 0:07:29Sorry, Yellows, it is true,
0:07:29 > 0:07:32which means the green light goes to the Reds.
0:07:33 > 0:07:38It actually does weigh that, 127kg on the ground.
0:07:38 > 0:07:41That's the same as three Ninja Nans.
0:07:41 > 0:07:44Right, Reds, it's time for your first true or false question.
0:07:44 > 0:07:48Walruses have a sucking power
0:07:48 > 0:07:51as strong as an average vacuum cleaner.
0:07:51 > 0:07:53Is that true, do you think, or false?
0:07:53 > 0:07:55True.
0:07:55 > 0:07:57Oliver, I'd like you to tell me.
0:07:57 > 0:08:00- OLIVER PARPS - It is, in fact, false.
0:08:00 > 0:08:02I'm really sorry, Reds, it's false,
0:08:02 > 0:08:07that means another green light is lit for the Yellows. So...
0:08:07 > 0:08:10in actual fact a walrus's sucking power
0:08:10 > 0:08:13is three times stronger than the average vacuum cleaner.
0:08:13 > 0:08:16They're no good for doing behind the sofa. They don't come
0:08:16 > 0:08:18with the attachment for that.
0:08:18 > 0:08:20Right, Yellows, you're in a very good position.
0:08:20 > 0:08:26The largest volcano in the solar system is found on Mars.
0:08:26 > 0:08:28Is that true or false?
0:08:28 > 0:08:30The largest volcano in the solar system is on Mars.
0:08:30 > 0:08:32You guys have a chat.
0:08:32 > 0:08:35Audience, let's see what you think. Vote with your feet, true or false?
0:08:35 > 0:08:40Five, four, three, two, one.
0:08:40 > 0:08:42SIREN WAILS
0:08:42 > 0:08:46The majority of the audience in favour of that being the case.
0:08:46 > 0:08:48Do we think so?
0:08:48 > 0:08:51Yeah, I think that it's true because I just had a guess.
0:08:51 > 0:08:55- We approve of guessing.- I looked at the picture and thought...
0:08:55 > 0:08:57- You think not.- No, I don't.
0:08:57 > 0:08:59No? OK, fair enough.
0:08:59 > 0:09:02Back to your places please, audience, back to your places.
0:09:02 > 0:09:05Yellows, this is what's the word?
0:09:05 > 0:09:07There is a word, hang on...
0:09:07 > 0:09:08..critical, that's the word.
0:09:08 > 0:09:10- Yep. - Because this is to win the game,
0:09:10 > 0:09:14or hand over a big juicy opportunity to do just that to the Reds.
0:09:14 > 0:09:15What do you think?
0:09:15 > 0:09:17- True. - You think it's true.
0:09:17 > 0:09:19Oliver, is it true or false?
0:09:19 > 0:09:22- OLIVER TOOTS - It's true.
0:09:22 > 0:09:25Third light and that's three to the yellows.
0:09:25 > 0:09:27It's actually called Olympus Mons
0:09:27 > 0:09:30and it's three times as tall as Mount Everest.
0:09:30 > 0:09:32It's pretty big as volcanoes go,
0:09:32 > 0:09:36and that means with three lights lit green, the Yellows take the lead.
0:09:36 > 0:09:39It's 1-0 to the Yellows and we move on.
0:09:53 > 0:09:56When I announced to the world
0:09:56 > 0:09:59that I had successfully built a time machine
0:09:59 > 0:10:02I braced myself for an avalanche of congratulations cards,
0:10:02 > 0:10:05maybe a knighthood, maybe the Nobel prize,
0:10:05 > 0:10:07but instead all that happened was
0:10:07 > 0:10:10the world's finest physics minds went into hiding.
0:10:10 > 0:10:12I think they were trying to tell me something,
0:10:12 > 0:10:14but I switched it on anyway and I used it
0:10:14 > 0:10:17to bring my old science teacher back through time to the lab,
0:10:17 > 0:10:19and it worked...sort of.
0:10:19 > 0:10:23It's just that she stepped out of it as a ten year old girl,
0:10:23 > 0:10:24and she is, of course, Mini Miss.
0:10:31 > 0:10:35- You never did listen, Richard. - Sorry, Miss, what were you saying?
0:10:35 > 0:10:39- Never mind. Let's just focus on today's game, shall we?- Pardon?
0:10:39 > 0:10:42You'd better not be winding me up, or I'll be speaking with your mother.
0:10:42 > 0:10:45- Yes, Miss, sorry, Miss, paying attention now, Miss.- Good.
0:10:45 > 0:10:47Today's game is called...
0:10:49 > 0:10:52All our teams have to do is take turns
0:10:52 > 0:10:56hanging these common or garden garage items off this super magnet.
0:10:56 > 0:11:00- Sounds easy enough, hang them off there.- But they must be careful,
0:11:00 > 0:11:03because the team that makes the magnet drop, loses the game.
0:11:03 > 0:11:06So this is all about judging weight and just how strong
0:11:06 > 0:11:09that magnet attraction is to that metal plate, isn't it?
0:11:09 > 0:11:12Finally, you've got something right, Richard.
0:11:12 > 0:11:14Yes, yes, no, I'm good at this, Miss.
0:11:14 > 0:11:17Actually I've got a joke about magnets.
0:11:17 > 0:11:19Where do magnets plant their potatoes?
0:11:21 > 0:11:23In a magnetic field.
0:11:23 > 0:11:26WIND WHISTLES BELL TOLLS
0:11:28 > 0:11:32No? No takers? No takers for that?
0:11:32 > 0:11:35OK, suddenly quite warm in here.
0:11:35 > 0:11:37Right, teams, before we get started on this
0:11:37 > 0:11:39you've got a bit of time to think about it.
0:11:39 > 0:11:41Mini Miss will talk tactics with you.
0:11:41 > 0:11:43You have a little bit of time to do that.
0:11:43 > 0:11:45This is all about the power of magnets.
0:11:45 > 0:11:48Magnets and magnetism are quite mysterious.
0:11:48 > 0:11:50Scientists are still looking into how they work.
0:11:50 > 0:11:54At the moment they think the reason things are or aren't magnetic
0:11:54 > 0:11:57is due to small regions within the materials things are made of
0:11:57 > 0:12:00called domains, and these domains act like tiny little magnets.
0:12:00 > 0:12:02If they all face the same direction,
0:12:02 > 0:12:04the theory is that makes something magnetic,
0:12:04 > 0:12:06so it sticks to other magnets.
0:12:06 > 0:12:09Here we have Blast Lab's super magnet.
0:12:09 > 0:12:12Hold on, urgh. Now this is being pulled upwards
0:12:12 > 0:12:16by a magnetic attraction between it and that metal plate.
0:12:16 > 0:12:19That's pulling that way, but when the teams hang objects off it,
0:12:19 > 0:12:22gravity is pulling them that way. Now for a while,
0:12:22 > 0:12:25the magnetic attraction pulling that way will be sufficient,
0:12:25 > 0:12:28but at some point, when this gets too heavy,
0:12:28 > 0:12:31the pull that way is going to overcome the pull that way
0:12:31 > 0:12:33and it'll all fall apart.
0:12:33 > 0:12:35Up to the team to judge it. Right, teams
0:12:35 > 0:12:37you've had a bit of time to talk tactics.
0:12:37 > 0:12:39Yellows, you're in the lead at the moment at 1-0,
0:12:39 > 0:12:42so you get to decide. Do you want to go first or second?
0:12:42 > 0:12:46- First please.- You want to go first. OK, well, let's get on with this.
0:12:46 > 0:12:50Make your choice, choose an object, Yellows.
0:12:50 > 0:12:53OK, oh, they're going for the fishing net.
0:12:53 > 0:12:56'OK. The fishing net is actually the lightest item,'
0:12:56 > 0:13:00weighing only 200g. OK, the first move has been made.
0:13:02 > 0:13:06'At just 500g, the wrench is the second lightest item.'
0:13:06 > 0:13:08- AUDIENCE:- Ooh. - Away you come.
0:13:09 > 0:13:13- Too heavy. - Ooh, you've picked it now.
0:13:13 > 0:13:16Some careful play from George for the Yellow Team.
0:13:16 > 0:13:21'The clamp weighs 800g, bringing the total so far to 1.5kg,
0:13:21 > 0:13:24'and the magnet's showing no signs of weakening.
0:13:24 > 0:13:27'What will the Reds pick next?'
0:13:27 > 0:13:29Ooh, they've gone for the mallet. 'Which weighs 1 kg.'
0:13:29 > 0:13:32- AUDIENCE:- Ooh.
0:13:32 > 0:13:36It's taken by the magnet, there you go, Connor, nice one.
0:13:36 > 0:13:39Gone for the dustbin lid, it's a biggy.
0:13:39 > 0:13:42'But not the heaviest, it only weighs 1 kg.'
0:13:43 > 0:13:46There you go, there you go.
0:13:46 > 0:13:49'The weight's really starting to build now, we're at 3.5 kg.'
0:13:49 > 0:13:52They've gone mallet, dustbin lid, Wellington boot.
0:13:52 > 0:13:55Classic play from the Reds.
0:13:55 > 0:13:58- AUDIENCE:- Ooooh.
0:13:58 > 0:13:59Easy.
0:13:59 > 0:14:00- AUDIENCE:- Yeah!
0:14:00 > 0:14:03'Ryan steps forward with the silver bucket,
0:14:03 > 0:14:06'our fifth heaviest item, weighing 1.2 kg.'
0:14:06 > 0:14:08- AUDIENCE:- Oooh.
0:14:08 > 0:14:10Success, there you go.
0:14:15 > 0:14:18'The Reds have gone for the hammer. Weighing only 700 grams.'
0:14:18 > 0:14:23Connor performing a hang for his team-mates.
0:14:23 > 0:14:26Executing a neat hang, but will it work?
0:14:26 > 0:14:29Yes! Well done, well done, nice play. Well done.
0:14:29 > 0:14:32'The magnet is holding 6.2kg,
0:14:32 > 0:14:36'and there's only one item left which weighs less than a kilo.'
0:14:36 > 0:14:40And they've gone for the foot pump. 'Good pick, Yellows, that's it.'
0:14:40 > 0:14:44'Will the magnet be able to support its added 800g?'
0:14:44 > 0:14:47He's done the hang, now he does the release,
0:14:47 > 0:14:51and the magnet takes the weight.
0:14:51 > 0:14:54You could cut the atmosphere in the lab with a knife right now.
0:14:59 > 0:15:02Some earnest chat at this point in the game.
0:15:02 > 0:15:06The team wondering how they're going to answer the Yellows' move.
0:15:06 > 0:15:10Abigail picks up the bicycle wheel for the Reds.
0:15:10 > 0:15:14'And it weighs a whopping 2kg.'
0:15:14 > 0:15:17Hang it at the side. Like... turn it round. Yeah, like that.
0:15:17 > 0:15:21- Try and hang it on something... - Some advice from her team mates.
0:15:21 > 0:15:24- Can we hang it on things?- Don't. - You can hang it on things
0:15:24 > 0:15:28as long as it's not touching the ground, that's all that matters.
0:15:28 > 0:15:30- Gently.- Stepping forward bravely with the wheel.
0:15:30 > 0:15:33- AUDIENCE:- Oooh. - She's got it hooked.
0:15:33 > 0:15:34Now can it take the weight?
0:15:34 > 0:15:37Ooh, nice play from the Reds.
0:15:38 > 0:15:41Ooh hoo. Yellows under massive pressure now.
0:15:41 > 0:15:45Just some heavyweight stuff to choose from, Yellows.
0:15:45 > 0:15:50The tool box is going to be heavy. But that's a five litre one...
0:15:53 > 0:15:55'It's a crucial decision here,
0:15:55 > 0:15:57'and let's hope they don't pick the tool box,
0:15:57 > 0:16:00'as it's the heaviest item weighing 2.7kg.
0:16:00 > 0:16:04'Oh, no, will this be a disastrous choice for the Yellow Team?
0:16:04 > 0:16:07'Will the magnet be able to hold the added weight?'
0:16:07 > 0:16:10Have the yellows made a mistake with this heavy choice?
0:16:10 > 0:16:14'After all, the magnet is already holding 9kg.'
0:16:14 > 0:16:18Hang it from the top. Nice one.
0:16:18 > 0:16:22- Ooh, struggling to get in with that. - AUDIENCE:- Ooooh.
0:16:22 > 0:16:25- CRASH - Bad luck, George. Bad luck, Yellows.
0:16:25 > 0:16:28It's gone, that means the Reds win.
0:16:29 > 0:16:32The magnet managed to hold up 9kg
0:16:32 > 0:16:35but the added 2.7kg of the tool box was too much,
0:16:35 > 0:16:37bringing it crashing to the ground.
0:16:37 > 0:16:41That means the score now is one-all. It's a draw right now.
0:16:45 > 0:16:46That game was fun,
0:16:46 > 0:16:50but hanging hooks on a magnet isn't exactly rocket science.
0:16:50 > 0:16:53I fancy something that really is rocket science.
0:16:54 > 0:16:58Lab Rats aren't very good at thinking for themselves.
0:16:58 > 0:16:59Well, they can do the basics,
0:16:59 > 0:17:02like knowing when they're hungry, happy or tired,
0:17:02 > 0:17:05and these three usually come one after the other.
0:17:05 > 0:17:08When they realise they're hungry, they eat, that makes them happy
0:17:08 > 0:17:11and then they just fall asleep.
0:17:13 > 0:17:18But outside of these things they need help in knowing what to do
0:17:18 > 0:17:22in the day, and that help comes in the form of lists, a lot of lists.
0:17:27 > 0:17:31But this list is nothing compared to the one Ninja Nan gives them
0:17:31 > 0:17:33for the lab's weekly shop.
0:17:33 > 0:17:37Nan isn't happy that Lab Rats take so long to get the food shopping,
0:17:37 > 0:17:41so she's called an expert to help speed things along.
0:17:41 > 0:17:43Hello, I'm a rocket expert.
0:17:43 > 0:17:47This is the principal lecturer for Rocketry and Aerospace Design
0:17:47 > 0:17:49at the University of Hertfordshire.
0:17:49 > 0:17:52With these rockets we hope to speed up the Lab Rats' shopping trip,
0:17:52 > 0:17:55but the expert has left it up to the Lab Rats
0:17:55 > 0:17:57to choose the fuel for their rockets.
0:17:57 > 0:17:59We're looking for high calorific food here.
0:17:59 > 0:18:02The higher the calorie content of the food,
0:18:02 > 0:18:04the more energy can be released when it's burnt.
0:18:04 > 0:18:07The Lab Rats have chosen cheese,
0:18:07 > 0:18:08toffee
0:18:08 > 0:18:11and burger.
0:18:11 > 0:18:14But surely, they can't drive a rocket?
0:18:14 > 0:18:17I think we need an animation.
0:18:17 > 0:18:20To make a rocket all we need is a fuel, which is a thing that burns,
0:18:20 > 0:18:23and an oxidizer, which helps the fuel to burn.
0:18:23 > 0:18:25Here we're going to use the food as our fuel.
0:18:25 > 0:18:28For the food to fuel our rocket successfully
0:18:28 > 0:18:29it needs to burn really quickly
0:18:29 > 0:18:34and produce enough hot gases to rush out the back of the rocket
0:18:34 > 0:18:38with sufficient force to launch our trolley forwards.
0:18:38 > 0:18:42But which one of the three foods will make the best rocket fuel?
0:18:44 > 0:18:47Hold the experiment right there. There's a point up for grabs.
0:18:47 > 0:18:51The score is one-all, so it'd be nice, wouldn't it, to get a decider?
0:18:51 > 0:18:52I will give that point to the team
0:18:52 > 0:18:55that tells me which food will make the best rocket fuel.
0:18:55 > 0:18:59You've got a choice of three - burgers, cheese and toffee,
0:18:59 > 0:19:03and it's based around the calorie content, you heard it said there,
0:19:03 > 0:19:05which is how much energy is in the food.
0:19:05 > 0:19:08But don't forget, that energy has to be got out and burnt,
0:19:08 > 0:19:12so which food is going to let that energy out the most effectively
0:19:12 > 0:19:13to turn it into rocket fuel?
0:19:13 > 0:19:16This really is rocket science. Reds, what do you think?
0:19:16 > 0:19:18- Toffee.- Yellows?
0:19:18 > 0:19:19- Burger.- Burger.
0:19:19 > 0:19:23So burger from the Yellows, toffee from the Reds.
0:19:23 > 0:19:26This could be a decider. If one of those two foods turns out
0:19:26 > 0:19:29to be the most useful here, that team will go into the lead.
0:19:29 > 0:19:31Let's find out.
0:19:32 > 0:19:36We're here to find out which of the three foodstuffs chosen by
0:19:36 > 0:19:39our Lab Rats makes the best alternative rocket fuel -
0:19:39 > 0:19:42cheese, burgers or toffee.
0:19:43 > 0:19:47Well, there's no point messing about, let's get on with it.
0:19:47 > 0:19:51Normally, cheese melts when it's heated,
0:19:51 > 0:19:53but will our rocket expert's rocket
0:19:53 > 0:19:56convert it to forward motion and speed? Let's find out.
0:19:56 > 0:20:00Three, two, one...
0:20:00 > 0:20:01..blast off!
0:20:03 > 0:20:07Ooh, we have movement. The trolley is being propelled along the runway,
0:20:07 > 0:20:11but it must be said, not very fast, and not very far.
0:20:11 > 0:20:15Right, onto the next fuel, toffee.
0:20:15 > 0:20:20Can the sugar fix turn into rocket power, or will it all end in tears?
0:20:20 > 0:20:24Three, two, one...
0:20:25 > 0:20:29..blast off. Well, the rocket is shooting along the runway.
0:20:29 > 0:20:31In fact, it's had a sugar crash
0:20:31 > 0:20:35as the trolley simply can't keep upright and has fallen to its side.
0:20:35 > 0:20:39Thankfully it had no shopping in it this time.
0:20:41 > 0:20:43Lastly, we have burger.
0:20:43 > 0:20:47Will this king of fast foods propel the shopping trolley
0:20:47 > 0:20:49at lightning speeds along the runway, making it
0:20:49 > 0:20:53ideal for Ninja Nan's shopping delivery? Let's find out.
0:20:53 > 0:20:56three, two, one...
0:20:56 > 0:20:58..blast off.
0:20:59 > 0:21:01Well, that'd be a no, then.
0:21:01 > 0:21:06The burger fuel converts into a bit of gas, and no movement whatsoever.
0:21:06 > 0:21:08Total distance zero metres.
0:21:08 > 0:21:12So of all the foodstuffs we converted into rocket fuel,
0:21:12 > 0:21:13the clear winner
0:21:13 > 0:21:17and only suitable fuel to propel Ninja Nan's shopping trolley is...
0:21:17 > 0:21:19toffee.
0:21:21 > 0:21:22Well...
0:21:24 > 0:21:28..it's a clear result and I heard a little, "oh, no," from the Yellows
0:21:28 > 0:21:30as the burger failed completely.
0:21:30 > 0:21:31The winner was toffee.
0:21:31 > 0:21:33The Reds take the point,
0:21:33 > 0:21:34it's 2-1 right now.
0:21:36 > 0:21:38Well done Reds, sorry Yellows,
0:21:38 > 0:21:41but it's not all over yet. You need to get changed into
0:21:41 > 0:21:44protective suits, ready for the Messy Messy Mess Test.
0:21:44 > 0:21:47Well done teams, and the score currently 2-1 to the Reds.
0:21:47 > 0:21:49And now it's time for...
0:21:53 > 0:21:56Which features this, my bungee powered catapult.
0:21:56 > 0:21:58I invented this to investigate
0:21:58 > 0:22:02if cats travelling at the speed of sound still land on their feet.
0:22:02 > 0:22:04A long detailed answer published in
0:22:04 > 0:22:08the latest journal of Advanced Feline Aerodynamics is... No.
0:22:08 > 0:22:12So now I just use the catapult to fire prize pods over my septic tank.
0:22:12 > 0:22:15The teams have to get these prize pods across the tank,
0:22:15 > 0:22:17into the prize zone at the end.
0:22:17 > 0:22:19The team that gets the most there wins,
0:22:19 > 0:22:22and they will win the prizes written on those pods.
0:22:22 > 0:22:23But there is a twist.
0:22:23 > 0:22:27One person from each team is in the gunge, they have two jobs,
0:22:27 > 0:22:30firstly to intercept the opposing team's prize pods
0:22:30 > 0:22:32as they travel across the tank,
0:22:32 > 0:22:35and secondly to return their own team's prize pods to the baskets
0:22:35 > 0:22:38for collection and firing by the bungee operator.
0:22:38 > 0:22:41Each team can also choose to fire...these.
0:22:41 > 0:22:43They are...
0:22:43 > 0:22:45Giant Hands Of Glory.
0:22:45 > 0:22:48Yup. These can be used to stop the opposing team's prize pods
0:22:48 > 0:22:52more efficiently, but it takes up valuable bungee time to fire them,
0:22:52 > 0:22:55because obviously you could be firing a prize pod at the same time.
0:22:55 > 0:22:58So it's up to you, teams, to decide when to go with those, if at all.
0:22:58 > 0:23:02Right, Reds, you're in the lead, so you have a five second head start.
0:23:02 > 0:23:05Yellows, only begin when you hear the second claxon.
0:23:05 > 0:23:08You have some time to get as many prize pods across the tank
0:23:08 > 0:23:11and into the prize zone as possible, and that some time starts,
0:23:11 > 0:23:14- are you ready? Now! - CLAXON HONKS
0:23:14 > 0:23:16Taking aim for the Reds,
0:23:16 > 0:23:17we have Connor.
0:23:17 > 0:23:18CLAXON HONKS
0:23:18 > 0:23:19There's the second siren.
0:23:19 > 0:23:20Ryan in charge
0:23:20 > 0:23:22of landing the prizes.
0:23:22 > 0:23:24a perfect hit, immediately followed
0:23:24 > 0:23:25by a perfect bounce
0:23:25 > 0:23:27straight out of the prize zone, bad luck.
0:23:29 > 0:23:30Oh, what's this?
0:23:30 > 0:23:32Sounds like one of my robots, Alan,
0:23:32 > 0:23:33has caught a cold again.
0:23:33 > 0:23:36- SQUELCH - Oh, Alan! Nasty!
0:23:36 > 0:23:39AUDIENCE CHANTS
0:23:40 > 0:23:410Ooh, the prize zone
0:23:41 > 0:23:42finally filling up,
0:23:42 > 0:23:44two red and one yellow pod
0:23:44 > 0:23:45now the score.
0:23:45 > 0:23:47And another red.
0:23:49 > 0:23:51ELECTRONIC HOOTING
0:23:51 > 0:23:52It sounds like another batch
0:23:52 > 0:23:54of robot snot is on the way as well.
0:23:54 > 0:23:55Go, go, go, go, go!
0:23:55 > 0:23:57I've no idea why it's pink.
0:23:57 > 0:23:59That's probably something
0:23:59 > 0:24:01I don't want to know, either.
0:24:01 > 0:24:02Anyway, back to the game.
0:24:02 > 0:24:05A lot of frantic firing going on,
0:24:05 > 0:24:08but are they hitting the target?
0:24:08 > 0:24:09Ooh, there is a Yellow hit,
0:24:09 > 0:24:11it's 3-2 to the Reds,
0:24:11 > 0:24:13it's still anyone's game
0:24:13 > 0:24:14at this point.
0:24:14 > 0:24:15Huge amounts of activity,
0:24:15 > 0:24:17very little to show for it,
0:24:17 > 0:24:19but an A for effort, certainly.
0:24:21 > 0:24:23A sea of pods now floating
0:24:23 > 0:24:24in the tank.
0:24:24 > 0:24:25Come on teams,
0:24:25 > 0:24:26plenty still to play for.
0:24:27 > 0:24:30Ooh, and some fumbling there
0:24:30 > 0:24:31from the Yellows.
0:24:31 > 0:24:33Ooh, and a great block
0:24:33 > 0:24:35from the Reds.
0:24:45 > 0:24:47And there's the countdown.
0:24:48 > 0:24:51- ALARM WHOOPS - That is it.
0:24:51 > 0:24:53Some time is up.
0:24:53 > 0:24:56And now we must add 'em up.
0:24:56 > 0:24:59Lab Rats, for the Reds, how many do we have, please?
0:24:59 > 0:25:02Four prize pods for the Reds. For the Yellows?
0:25:02 > 0:25:06Two. That means it's a win for the Reds.
0:25:06 > 0:25:07It's a win for the Reds.
0:25:07 > 0:25:09Sorry, Yellows, I'm sorry.
0:25:09 > 0:25:12So, let's see what you've won.
0:25:12 > 0:25:15Each of you taking home a flying UFO, nice.
0:25:15 > 0:25:18- A skeleton model, oh, yeah. - AUDIENCE:- Woo!
0:25:18 > 0:25:21A projector watch.
0:25:21 > 0:25:24And a transforming ball.
0:25:25 > 0:25:27So, Yellows, now the slightly tricky bit,
0:25:27 > 0:25:29we have to look at what you would've won.
0:25:29 > 0:25:33Let's have a look. Ninja Nan, ready? Lab rat, what've we got?
0:25:33 > 0:25:34A radio controlled spider,
0:25:34 > 0:25:37- that could've been handy. - AUDIENCE:- Ahh!- Yeah, I know.
0:25:37 > 0:25:40- Projector watch. - AUDIENCE:- Ahh!
0:25:40 > 0:25:42That would've been nice.
0:25:42 > 0:25:43There's a tradition on Blast Lab.
0:25:43 > 0:25:46Only one team can take their fabulous prizes home.
0:25:46 > 0:25:49Well, the other team can, but it would take ages to find the pieces
0:25:49 > 0:25:55after they've blown them up, because it is time for Bidet Goes Bang.
0:26:02 > 0:26:07Well done, Reds, all of this lot coming home with you, nicely played.
0:26:07 > 0:26:09Yellows, there's only one thing to do now,
0:26:09 > 0:26:12it's time to put your best foot forward,
0:26:12 > 0:26:14and then your worst foot, and then your best foot,
0:26:14 > 0:26:17and then... basically we're walking.
0:26:17 > 0:26:18It's time for the walk of shame.
0:26:18 > 0:26:19Follow me guys, come on.
0:26:19 > 0:26:21- Come on. - AUDIENCE:- Ah!
0:26:21 > 0:26:22Let's give 'em a pat on the back.
0:26:22 > 0:26:26No, don't pat me, I'm all right, I haven't lost.
0:26:26 > 0:26:30Don't pat me, I'm fine, it's them.
0:26:30 > 0:26:33I'm fine. Right, come on, Yellows.
0:26:35 > 0:26:38Right then, lads, you know the drill.
0:26:39 > 0:26:43If you'd like to lift the handle, let's get this done.
0:26:43 > 0:26:48Five, four, three, two, one.
0:26:48 > 0:26:50BOOM! AUDIENCE CHEERS
0:26:51 > 0:26:55- Well played, Yellows. Thanks for coming in.- Thank you.
0:26:55 > 0:26:58So today we've had some fun with magnets
0:26:58 > 0:27:00and seen a cheese-powered shopping trolley.
0:27:00 > 0:27:02Tell your friends, cos believe me,
0:27:02 > 0:27:05it's unlikely you'll ever use that sentence again in your life.
0:27:05 > 0:27:08- Thanks for joining me. Bye-bye. - AUDIENCE CHEERS
0:27:08 > 0:27:09Sorry, lads.
0:27:33 > 0:27:36Subtitles by Red Bee Media Ltd
0:27:36 > 0:27:40E-mail subtitling@bbc.co.uk