0:00:36 > 0:00:41I must remember to put a hole up there. Helps the descend thing.
0:00:41 > 0:00:44Hello. I'm Richard Hammond. This is my Blast Lab.
0:00:48 > 0:00:51Now, it is top secret down here.
0:00:51 > 0:00:55- Don't tell your mum and dad. - WHISPERS:- They're spies.
0:00:55 > 0:00:57Let's look at what's coming up.
0:01:08 > 0:01:12You can't have a secret underground lab if it isn't protected,
0:01:12 > 0:01:17which is why I have a team of SAS guards to look after Blast Lab.
0:01:17 > 0:01:21Unfortunately, one of them got his head stuck in some railings
0:01:21 > 0:01:25and the others are waiting until the fire brigade turn up.
0:01:25 > 0:01:30But don't worry. In the meantime, her chops are deadly.
0:01:30 > 0:01:35More formidable than her cooking ability is her kung fu skill.
0:01:35 > 0:01:38She is, of course, my Ninja Nan!
0:01:38 > 0:01:40CHEERS AND APPLAUSE
0:01:47 > 0:01:49Ninja Nan, thanks for standing in.
0:01:49 > 0:01:53She looks fragile but she is a trained Ninja.
0:01:58 > 0:01:59See?
0:01:59 > 0:02:04Ninja Nan, if you'd take your place in security. Ninja Nan!
0:02:04 > 0:02:06Take your place in security please.
0:02:06 > 0:02:09How do you DO that?
0:02:09 > 0:02:11OK. Away she goes.
0:02:11 > 0:02:14Look at her move! The grace, the stealth, the power.
0:02:14 > 0:02:18In her day, she was quite a looker. Used to stop traffic.
0:02:18 > 0:02:21With her finger, like that.
0:02:21 > 0:02:24Nearly there. Still travelling.
0:02:24 > 0:02:29Are you there, Ninja Nan? There she is in her security post.
0:02:29 > 0:02:32I feel safer with her Ninja shopping trolley.
0:02:32 > 0:02:38A cup of tea! She may as well be comfortable while she's guarding us.
0:02:38 > 0:02:40Oh, cups. Very nice.
0:02:40 > 0:02:42Best china. A cake.
0:02:42 > 0:02:44Lovely. OK, Ninja Nan.
0:02:44 > 0:02:48That'll help in looking after us in Blast Lab.
0:02:48 > 0:02:53Some cakes. We'll leave Ninja Nan to settle into her security post.
0:02:53 > 0:02:57Let's meet the people trying to get into my lab today.
0:02:59 > 0:03:04It's all well and good getting excited. They could be anybody.
0:03:04 > 0:03:07I have to carry out some checks.
0:03:07 > 0:03:11For security reasons, identify yourselves by name.
0:03:11 > 0:03:14- SHOUT Yasmine!- Megan!- Rosie!
0:03:14 > 0:03:20Yasmine, Megan and Rosie. That checks out. Now, hidden talent.
0:03:20 > 0:03:25It says here that the real Rosie from the real yellow team
0:03:25 > 0:03:28can tuck her ear inside itself.
0:03:28 > 0:03:30Can you do that?
0:03:33 > 0:03:38Oh, wow! You are cleared through security. Come into the blast lab.
0:03:38 > 0:03:40CHEERING
0:03:43 > 0:03:48Sorry about the security checks. You can't let just anybody in.
0:03:48 > 0:03:53- Where are you all from? - SHOUT: Kent! We are the Big Brains.
0:03:53 > 0:03:57Good name, but useless. You're the yellow team. That's that.
0:03:57 > 0:04:00Now, the people who claim to be your opposition.
0:04:00 > 0:04:03They SAY they're the red team.
0:04:05 > 0:04:09You could just be three boys trying to get into my Blast Lab.
0:04:09 > 0:04:15- Identify yourselves by name, please. - I'm Scott.- I'm Jack.- I'm Morgan.
0:04:15 > 0:04:19Scott, Jack and Morgan. Yeah, Morgan. I've got your name.
0:04:19 > 0:04:24Hidden talent. You can turn your foot to face the other way?
0:04:25 > 0:04:28Whoa! That is facing the wrong...
0:04:28 > 0:04:30Can you turn it back again?
0:04:30 > 0:04:36Fair enough. You are the red team. You are cleared through security.
0:04:38 > 0:04:40Where have you all come from?
0:04:40 > 0:04:45ALL: Staffordshire and we're The Rockers!
0:04:45 > 0:04:49Good name, but useless cos your name is the red team.
0:04:49 > 0:04:51OK, red and yellow team.
0:04:51 > 0:04:56Get settled in for round one. That's what we're doing next.
0:04:56 > 0:05:00It's time to meet a friend of mine. He's got a top speed of 75mph.
0:05:00 > 0:05:04That's "Maths Problems per Hour"! Oliver!
0:05:21 > 0:05:26Oliver is fitted with a state-of-the-art Fact Nav system.
0:05:26 > 0:05:30I came up with the idea myself, in my sleep!
0:05:30 > 0:05:35I don't think I'd woken up properly, so it doesn't work very well.
0:05:35 > 0:05:37A lot of the facts aren't correct.
0:05:37 > 0:05:41Our teams tell me which are true and which are false.
0:05:41 > 0:05:45Oliver will reveal the answer. If it's true, he'll do this.
0:05:45 > 0:05:47CAR HORN
0:05:48 > 0:05:52- And if it's false he'll do this. - FOG HORN
0:05:52 > 0:05:57OK, teams, your science facts. Tell me if it's true or false.
0:05:57 > 0:06:01Everybody comfortable and relaxed? Mm... Maybe not, Megan!
0:06:01 > 0:06:06Here comes your science fact. Reds first. Is this true or false?
0:06:06 > 0:06:11Earth orbits the Sun at about 6,700 miles an hour,
0:06:11 > 0:06:18which, obviously, you'll be able to tell me, is 10,782.6 kilometres an hour.
0:06:18 > 0:06:21Earth orbits the Sun at 6,700 miles an hour.
0:06:21 > 0:06:25Think before you say true or false. Work it out between you.
0:06:25 > 0:06:28Audience, what do we think?
0:06:28 > 0:06:32- EVERYONE: True! - I think that's unanimous.
0:06:32 > 0:06:35Don't just go with what they think.
0:06:35 > 0:06:38- What do you think? - We think true.
0:06:38 > 0:06:41- Everybody agrees?- Yes.- OK.
0:06:41 > 0:06:44Oliver, is it true or false?
0:06:44 > 0:06:48- FOG HORN - Ah. It's false. No points for you.
0:06:48 > 0:06:52Actually, it's 67,000 miles an hour, which is four thousand...
0:06:52 > 0:06:56I can't work it out but it's very, very fast indeed.
0:06:56 > 0:07:02The Earth also spins at 1,000 miles an hour, 1,600 kilometres an hour.
0:07:02 > 0:07:05Right, yellows. Here is your science fact.
0:07:05 > 0:07:08Tell me if this is true or false.
0:07:08 > 0:07:13A single dairy cow belches and passes wind
0:07:13 > 0:07:18amounting to 114 kilos of methane a year.
0:07:18 > 0:07:20Is that true or false?
0:07:20 > 0:07:23Taking that VERY seriously - a good sign.
0:07:23 > 0:07:25Audience, is that true or false?
0:07:25 > 0:07:28- TOGETHER:- True!- False!
0:07:28 > 0:07:32- I think it's true. - What are you going for?- True.
0:07:32 > 0:07:34- You all agreed?- Yeah.- Oliver?
0:07:34 > 0:07:36CAR HORN
0:07:36 > 0:07:39True! A point for the yellows! Well done.
0:07:39 > 0:07:44The equivalent, from a single cow, to 2,600 kilos of carbon dioxide,
0:07:44 > 0:07:49almost 50% of an average 4x4's emissions in a year!
0:07:49 > 0:07:52This time, I don't want true or false.
0:07:52 > 0:07:55I want you to write me an answer on the board.
0:07:55 > 0:08:00I'll give the point to the team that gets nearest to the answer.
0:08:00 > 0:08:02Here is the question.
0:08:02 > 0:08:06How many colours is the Eiffel Tower painted?
0:08:06 > 0:08:11Audience, how many colours is the Eiffel Tower painted? Any ideas?
0:08:11 > 0:08:15I can talk to you with my invention. A traffic cone.
0:08:15 > 0:08:19The microphone is hidden. It's a micro-cone.
0:08:19 > 0:08:23Any theories over here, audience? What do we reckon?
0:08:23 > 0:08:28- Two or three?- Two OR three? We like precision in Blast Lab!
0:08:28 > 0:08:30- What do you think?- Five.
0:08:30 > 0:08:34- Six.- You think it's painted in six different colours?
0:08:34 > 0:08:38There are no points for the audience but there are for the teams.
0:08:38 > 0:08:42Turn your boards round. Let's look at what you've got.
0:08:42 > 0:08:45Two for the reds. None for the yellows.
0:08:45 > 0:08:48- Does that mean it's invisible? - THEY LAUGH
0:08:48 > 0:08:53Because they want to make it appear one colour,
0:08:53 > 0:08:56but with all the different backgrounds,
0:08:56 > 0:09:00to make it look one colour, it is painted in three colours.
0:09:00 > 0:09:03- The reds get the point! - APPLAUSE
0:09:05 > 0:09:08So the scores are 1-1.
0:09:20 > 0:09:23That's all to come.
0:09:23 > 0:09:27Now, Mini Science, where we try experiments with everyday objects.
0:09:27 > 0:09:30I wanted the best person to help,
0:09:30 > 0:09:33so I transported my science teacher through time.
0:09:33 > 0:09:39Something went wrong and she came back as a ten-year-old - Mini Miss!
0:09:44 > 0:09:47- Good afternoon, Richard. - Afternoon, Miss. Miss?
0:09:47 > 0:09:51I'm really sorry about the time travel going wrong.
0:09:51 > 0:09:55- Good boy for apologising, Richard. - Thank you, Miss.
0:09:55 > 0:09:59- On the bright side, you can ride on buses for free.- Wrong, Richard.
0:09:59 > 0:10:05As a 65-year-old, I had a bus pass. Stop trying to be a smarty pants.
0:10:05 > 0:10:08Sorry. What experiment are we doing?
0:10:08 > 0:10:14We're looking at transfer of energy in a game called magnetic pinball.
0:10:14 > 0:10:19The teams are going to use magnets to launch these ball bearings
0:10:19 > 0:10:23onto a map that has marked distances on it.
0:10:23 > 0:10:29The teams have to launch these balls using these magnets and this ramp.
0:10:29 > 0:10:33A combination of ball bearings stuck to the magnet will determine
0:10:33 > 0:10:35how far their ball travels.
0:10:35 > 0:10:38Each team gets three attempts.
0:10:38 > 0:10:42The winning team is the one that gets their ball to travel furthest.
0:10:42 > 0:10:45This is the machine. It's very clever.
0:10:45 > 0:10:50There's this channel, two magnets and where the ball bearings sit.
0:10:50 > 0:10:52You fire the ball bearing in.
0:10:52 > 0:10:56As it goes up, this magnet pulls it towards it.
0:10:56 > 0:10:57That accelerates it.
0:10:57 > 0:11:02When it hits the magnet the energy is transferred, the energy transfer.
0:11:02 > 0:11:04That's correct, Richard.
0:11:04 > 0:11:08It's transferred through until this one is free.
0:11:08 > 0:11:11It moves further up the ramp.
0:11:11 > 0:11:15Another magnet accelerates it even more, it hits that magnet,
0:11:15 > 0:11:19then all the energy transfers through to the one on the end,
0:11:19 > 0:11:22which is free to fly, and it does.
0:11:22 > 0:11:26It's not luck about the combinations of ball bearings.
0:11:26 > 0:11:28There are scientific reasons
0:11:28 > 0:11:31why some numbers work better than others.
0:11:31 > 0:11:36That's up to you to experiment and try and win.
0:11:36 > 0:11:42We have to decide which team goes first so we're going to draw pens.
0:11:42 > 0:11:44Reds, pick a pen.
0:11:44 > 0:11:46Yellows, pick a pen.
0:11:46 > 0:11:50Pick a pen. Pick a pen. The options are running out.
0:11:50 > 0:11:54That's the short one! Yellow team, do you want to go first or second?
0:11:54 > 0:11:57- Can we go first, please?- OK.
0:11:57 > 0:12:02There is a lot of planning to decide which combination of ball bearings
0:12:02 > 0:12:07to get your ball bearing to fire the furthest.
0:12:07 > 0:12:09Have a bit of a think. You've got time.
0:12:09 > 0:12:13Reds, going second. You, too, have a think.
0:12:13 > 0:12:17There are some very good reasons why this will work.
0:12:17 > 0:12:22If there are too many ball bearings the energy will be wasted.
0:12:22 > 0:12:28When you fire the ball bearing in you've loaded it up with energy.
0:12:28 > 0:12:32But when it hits the magnet, that click takes energy.
0:12:32 > 0:12:37If we click from one to the next, that's more energy being wasted.
0:12:37 > 0:12:41So when it gets to the end, there's less than at the beginning.
0:12:41 > 0:12:44If you have too many, it's wasteful.
0:12:44 > 0:12:48Too few, the ball bearing at the top is too close to the magnet.
0:12:48 > 0:12:52So when it leaves, it's still being pulled back by the magnet.
0:12:52 > 0:12:55It's up to them to work it out.
0:12:56 > 0:13:00- Yellows, have you decided?- Yeah.
0:13:00 > 0:13:02I'll do five and two.
0:13:02 > 0:13:04OK. Load it up.
0:13:04 > 0:13:08So that's two in the top magnet, five in the bottom one.
0:13:08 > 0:13:11- Are we ready to do this?- Yeah.- OK.
0:13:11 > 0:13:14In your own time, yellows, fire.
0:13:14 > 0:13:18It's rolling to a stop. There we go.
0:13:18 > 0:13:21Lab rats, mark the final point.
0:13:26 > 0:13:28What are we going to do?
0:13:28 > 0:13:31We're going with four and five.
0:13:31 > 0:13:35You saw five and two. Why are you changing it?
0:13:35 > 0:13:38Because... I don't know, really.
0:13:38 > 0:13:43Sometimes you've got to experiment and try different things.
0:13:46 > 0:13:48So, it's four and five.
0:13:48 > 0:13:51Commence firing in your own time.
0:13:52 > 0:13:54Ooh! Yes!
0:13:54 > 0:13:56Just past.
0:14:03 > 0:14:05Yellows, what are you going for?
0:14:05 > 0:14:09- Six at the top and four at the bottom.- Explain why.
0:14:09 > 0:14:15Because on the last one, they got better from doing more at the top.
0:14:15 > 0:14:19- And decreasing the number on the bottom.- Yeah.- See what happens.
0:14:23 > 0:14:26Ooh! It looked like a good start.
0:14:26 > 0:14:30Ooh! It drew to a halt. Lab rat, mark that, please.
0:14:35 > 0:14:38- Your combination is three in each? - Yeah.
0:14:42 > 0:14:45Look at that! Reds go into the lead.
0:14:46 > 0:14:48Well done.
0:14:50 > 0:14:53- Five and five. - We didn't discuss that.
0:14:53 > 0:14:57Maybe you should discuss it cos Megan seems to disagree.
0:14:57 > 0:15:02You have some time. Not every scientific discussion is gentle.
0:15:02 > 0:15:04Sometimes, it's intense.
0:15:04 > 0:15:06Sometimes, it's just a fight.
0:15:06 > 0:15:09Have we agreed or do I need a lab rat as a ref?
0:15:09 > 0:15:13- We're doing...- Five at the top and five at the bottom.
0:15:13 > 0:15:15OK. Let's see what happens.
0:15:15 > 0:15:17Good luck, yellows.
0:15:17 > 0:15:20It's a strong start. Oh!
0:15:20 > 0:15:25It's drawn to a close. Reds, there's no point having another go.
0:15:25 > 0:15:27The point goes to the red team.
0:15:31 > 0:15:34The scores now then are...
0:15:34 > 0:15:40Once you put energy into something, like this system here,
0:15:40 > 0:15:43it has to go somewhere, it can't vanish.
0:15:43 > 0:15:48The posh term is "conservation of energy within a system". Try that!
0:15:48 > 0:15:52Let's use the idea of conservation of energy
0:15:52 > 0:15:54but for a much bigger experiment.
0:15:57 > 0:16:00'Lab rats are notoriously lazy.
0:16:00 > 0:16:06'An experiment about conservation of energy should be up their street.
0:16:06 > 0:16:11'Apparently, if we let this pig go next to our lab rat's face,
0:16:11 > 0:16:13'it shouldn't come back and hit him.
0:16:13 > 0:16:17'Science says this is because, as the pig is lifted,
0:16:17 > 0:16:19'it's given energy.
0:16:19 > 0:16:24'As it swings, some of its energy is transferred into heat and sound.
0:16:24 > 0:16:28'When it swings back, it will have less energy and won't swing as high,
0:16:28 > 0:16:34'saving our lab rat's face - at least, that's what science says.'
0:16:38 > 0:16:42'So far, so good, the pig never reaching the starting point.
0:16:42 > 0:16:45'What happens if we increase the weight?
0:16:45 > 0:16:51'An anvil. Perfect. Take it to the swing and see how we get on.
0:16:52 > 0:16:56'Come on! Put your backs into it.
0:16:56 > 0:17:01'Pathetic. OK. Forget the anvil. Let's use something else.
0:17:01 > 0:17:05'What we need are two cranes and one large family car.
0:17:07 > 0:17:12'So, no more messing around. This time, it's serious.
0:17:12 > 0:17:15'Lab rat, get to your position.
0:17:15 > 0:17:18'And don't move a muscle.
0:17:25 > 0:17:29'Three, two, one... Release.'
0:17:30 > 0:17:34Hold it there! There's another point available.
0:17:34 > 0:17:38Score is 2-1 to the reds. You'll start in the Messy Messy Mess Test.
0:17:38 > 0:17:44Yellows, you equalise if you win the point so you start at the same time.
0:17:44 > 0:17:49A point to the team who accurately tells me what's going to happen.
0:17:49 > 0:17:52What will happen? Remember, this is a lot heavier.
0:17:52 > 0:17:58Audience, do we reckon it will hit the lab rat...? Some do. Some don't.
0:17:58 > 0:18:03- Come to a conclusion?- We don't think it will hit the lab rat in the face.
0:18:03 > 0:18:07- Sounds like there's a "but" coming. - There's not.
0:18:07 > 0:18:12- You don't think the lab rat will get hit. Reds?- We don't think so either.
0:18:12 > 0:18:19So it doesn't change anything. Reds will still be in the lead. Let's find out.
0:18:19 > 0:18:21'It's come to this.
0:18:21 > 0:18:24'One large family car.
0:18:24 > 0:18:27'Two giant cranes.
0:18:27 > 0:18:31'And one big girl's blouse.
0:18:31 > 0:18:36'The car weighs more than 1,200kg and is covered with toughened sheet metal.
0:18:36 > 0:18:42'The lab rat comes in at 80kg and is covered with loose sagging skin.
0:18:42 > 0:18:44'Who will come out on top?
0:18:44 > 0:18:47'Three, two, one... Release.
0:18:51 > 0:18:54'Lucky we're not in a hurry.
0:18:55 > 0:18:59'It'll get there soon, lab rat. Be careful.
0:19:01 > 0:19:05'See? Nothing to worry about!'
0:19:05 > 0:19:09That means a point to both teams.
0:19:09 > 0:19:12That means the score's now...
0:19:12 > 0:19:16It's because the only energy it had was the energy it took
0:19:16 > 0:19:19to lift it up to that point.
0:19:19 > 0:19:23It could go no higher than the point from which it was released.
0:19:23 > 0:19:28Teams, I need you to get ready for the Messy Messy Mess Test.
0:19:28 > 0:19:30You go and get ready.
0:19:30 > 0:19:33It's interesting pushing the boundaries of science.
0:19:33 > 0:19:38I'm not going to hurt a lab rat when he's been doing an experiment,
0:19:38 > 0:19:41which should be finished now.
0:19:41 > 0:19:43CRASH
0:19:44 > 0:19:47That doesn't sound good at all.
0:19:47 > 0:19:52That lab rat dropped Ninja Nan's tea set. She's not gonna like that.
0:19:52 > 0:19:56He hasn't had the sense to run away. I can't look.
0:19:56 > 0:19:59THWACK! THWACK! Y-yah!
0:19:59 > 0:20:06That's all bad. Time for us to move on to the Messy Messy Mess Test. Ah.
0:20:09 > 0:20:12Which is... the Bridge of Destiny.
0:20:12 > 0:20:15SPOOKILY ECHOES The Bridge of Destiny.
0:20:15 > 0:20:19Your prizes - a mineral dig, an MP3 player and a bionic helicopter -
0:20:19 > 0:20:23need to be transported across this tank.
0:20:23 > 0:20:27If they touch the toxic gunge, they'll be useless cos they'll melt.
0:20:27 > 0:20:31I was working out how many monkeys it would take
0:20:31 > 0:20:35to write a My Little Fairy book when a monkey escaped
0:20:35 > 0:20:38and smashed up the bridges over the tank.
0:20:38 > 0:20:42The pieces fell into the goo you're standing in.
0:20:42 > 0:20:46See if you can find them in time to get your truck across.
0:20:46 > 0:20:52I think the monkey fell in, too, so try not to find that. It bites.
0:20:52 > 0:20:56Right, you forage about in the toxic gunge. Find all the pieces.
0:20:56 > 0:20:58Assemble your bridge of destiny...
0:20:58 > 0:21:02SQUEAKY VOICE The Bridge of Destiny.
0:21:02 > 0:21:07..before your prizes are lost in the chasm below your bridge of destiny.
0:21:07 > 0:21:12DEEP DRAMATIC VOICE: The Bridge of Destiny. Take it to the bridge.
0:21:12 > 0:21:15As soon as you finish, release the car
0:21:15 > 0:21:18to pull your trailer of prizes across.
0:21:18 > 0:21:23Red team, you got most points. They earned you a five-second advantage.
0:21:23 > 0:21:26When you hear the siren, you start.
0:21:26 > 0:21:29Yellows, begin when you hear the second siren.
0:21:29 > 0:21:33This is a straight race and that race starts...
0:21:33 > 0:21:34- SIREN - Now.
0:21:34 > 0:21:38The reds make the most of their five-second head start.
0:21:38 > 0:21:42Confusion reigns. They don't know where to begin.
0:21:42 > 0:21:46- SIREN - There's the second siren.
0:21:46 > 0:21:49The reds have blown their advantage.
0:21:49 > 0:21:52The pressure seems to be getting to the yellows.
0:21:52 > 0:21:57Tempers are frayed and there's a lot of screaming,
0:21:57 > 0:21:59but very little teamwork right now.
0:21:59 > 0:22:05CHEERING AND SHOUTING
0:22:05 > 0:22:09Both teams yet to put a single piece of the bridge together.
0:22:14 > 0:22:16It is absolute mayhem out there.
0:22:18 > 0:22:23And a quick check on the bridges reveals they're neck-and-neck,
0:22:23 > 0:22:26with no pieces in place!
0:22:26 > 0:22:30Do they even know the rules of the game?
0:22:30 > 0:22:35ALL SHOUT AT EACH OTHER
0:22:37 > 0:22:40Amazing! Are my eyes deceiving me? No.
0:22:40 > 0:22:43The reds have a piece in place.
0:22:43 > 0:22:47I repeat. The reds have a piece in place. So do the yellows.
0:22:47 > 0:22:49It's all kicking off.
0:22:49 > 0:22:53This game, of course, scientifically tested in the Blast Lab
0:22:53 > 0:22:57to be guaranteed of being able to engender an argument
0:22:57 > 0:23:00in the most harmonious of teams.
0:23:00 > 0:23:06We had this game played by a load of monks from a distant mountain.
0:23:06 > 0:23:09Within seconds, a massive fight.
0:23:12 > 0:23:17What's this? The reds fit a second section. And the yellows?
0:23:17 > 0:23:21The one thing the yellows seem to be VERY good at
0:23:21 > 0:23:23is arguing.
0:23:23 > 0:23:28The reds trying brawn over brain. Very scientific(!)
0:23:30 > 0:23:35The yellows seem to be losing more than just their patience.
0:23:38 > 0:23:42The reds are a building machine.
0:23:42 > 0:23:47The reds now just putting the final touches to their bridge.
0:23:47 > 0:23:51What's this? The yellows pull their lever to start the truck.
0:23:51 > 0:23:54They haven't finished their bridge yet.
0:23:54 > 0:23:58The yellows sort of place the last section. Will it hold?
0:23:58 > 0:24:02Yes. And the reds blocked their own truck.
0:24:02 > 0:24:06The reds have self-destructed in front of my very eyes.
0:24:06 > 0:24:11We've got to make a call. There was some improvising going on.
0:24:11 > 0:24:15The fact is, the race is to get the pods across the tank.
0:24:15 > 0:24:19And the first team to do that, by constructing a unique bridge,
0:24:19 > 0:24:21was the yellow team!
0:24:21 > 0:24:25Huge drama and not just a little controversy.
0:24:25 > 0:24:28The reds looked to have had the race in the bag.
0:24:28 > 0:24:34Risk taking from the yellows and premature celebrating from the reds
0:24:34 > 0:24:40meant the yellows stealing victory from the jaws of defeat.
0:24:40 > 0:24:42TEAMS ARGUE
0:24:42 > 0:24:46One important thing. I'm in charge. You're in a tank of gunge.
0:24:46 > 0:24:53They got their truck across. That's what you've got to do and they did it. Sorry, reds.
0:24:53 > 0:24:55Yellows, here's what you've won.
0:24:55 > 0:24:57Ready, Nan?
0:24:57 > 0:24:59A plug-and play electronics set,
0:24:59 > 0:25:02a Bop It game,
0:25:02 > 0:25:04a bionic 'copter,
0:25:04 > 0:25:06Mineral Dig,
0:25:06 > 0:25:1120 Questions game and an MP3 player.
0:25:13 > 0:25:16Reds, you would have won exactly the same.
0:25:16 > 0:25:19But here's the great bit.
0:25:19 > 0:25:24You're going to blow them up in Bidet Goes Bang!
0:25:32 > 0:25:38Here we are. Yellows behind a huge mountain of prizes to take home.
0:25:38 > 0:25:42Reds behind a huge plunger to blow theirs up. Here's how we got here.
0:25:42 > 0:25:48What happened was the yellow team, for some reason, were madly brave
0:25:48 > 0:25:52in pulling the handle before the red team,
0:25:52 > 0:25:57and at the last minute managed to get the last piece in sideways!
0:25:57 > 0:26:02The rules are you've got to get your car across the tank, and you did!
0:26:02 > 0:26:07Reds, you were second pulling it - this is too painful to talk about -
0:26:07 > 0:26:13and you were so busy celebrating that you got in the way of the car across the bridge!
0:26:13 > 0:26:18Let's not even go there because, well, we're in front of the plunger.
0:26:18 > 0:26:23Not many people know this, "bidet" is French for "blow-up day".
0:26:23 > 0:26:25Probably.
0:26:25 > 0:26:29That's what we're going to do now. Prizes are loaded in.
0:26:29 > 0:26:33- Who's going to do the deed, reds? - ALL: All of us.
0:26:33 > 0:26:38- All together?- Yeah.- That's probably best after the last experience!
0:26:38 > 0:26:42Step forwards and lift the plunger. Don't plunge straight away.
0:26:42 > 0:26:46We're going to give you a countdown. Lift it up. OK.
0:26:46 > 0:26:49Here we go. Five, four...
0:26:49 > 0:26:51three, two, one!
0:26:58 > 0:27:03Our time is up. We've been learning about conservation of energy.
0:27:03 > 0:27:10I'm going to conserve energy by getting a lab rat to bring me my tea. See you next time.
0:27:14 > 0:27:21'Blast Lab was recorded before a studio audience. No lab rat was harmed during filming.
0:27:21 > 0:27:26'Well, that's not entirely true but best not to say anything.'
0:27:26 > 0:27:29Subtitles by Red Bee Media Ltd