0:00:34 > 0:00:36Lab rat, just let me in!
0:00:36 > 0:00:38It's me, Richard, it's my lab, let me...
0:00:38 > 0:00:42Hit the button, open the door, let me in! Lab rat!
0:00:47 > 0:00:49Yep, it's very reassuring
0:00:49 > 0:00:53to know that my anti-intruder cannon is working, but I'm not an intruder,
0:00:53 > 0:00:57and if you do that again it'll be your head in the cannon next time.
0:00:57 > 0:01:00Hello, I'm Richard Hammond. This is my Blast Lab!
0:01:03 > 0:01:07On with my lab coat. I've invited two teams of young scientists here
0:01:07 > 0:01:09to take part in challenges.
0:01:09 > 0:01:11The winning team will take home prizes.
0:01:11 > 0:01:13The losing team gets to blow theirs up.
0:01:13 > 0:01:15Let's have a look at what's in store.
0:01:28 > 0:01:30Now, what with this being a
0:01:30 > 0:01:32top secret underground lab and everything,
0:01:32 > 0:01:37it's usually guarded round the clock by an elite team of SAS officers.
0:01:37 > 0:01:39Unfortunately, they all put their balaclavas in
0:01:39 > 0:01:42the wash with a Red jumper yesterday and they came out pink.
0:01:42 > 0:01:45So they've had to go balaclava shopping instead of coming here.
0:01:45 > 0:01:47But don't worry, I've replaced them with a lady who's
0:01:47 > 0:01:50less SAS and more OAP.
0:01:50 > 0:01:52She is, of course, my Ninja Nan.
0:02:02 > 0:02:04Ninja Nan, thanks for standing in.
0:02:04 > 0:02:07I know, she looks fragile.
0:02:07 > 0:02:09But she's actually a trained Ninja.
0:02:13 > 0:02:16See? Ninja Nan, if you...
0:02:16 > 0:02:19Oh, turn it up! Ninja Nan!
0:02:19 > 0:02:23If you'd like to make your way to Security, thank you very much.
0:02:23 > 0:02:27Off she goes with her little ninja shopping trolley there.
0:02:27 > 0:02:29Look at the speed.
0:02:29 > 0:02:32She came back from the Olympics with a gold medal, you know.
0:02:32 > 0:02:35She didn't win it, she beat up the rowers who'd won it.
0:02:35 > 0:02:37OK, she should be about there by...
0:02:37 > 0:02:40Oh, she is. Oh no, there's a lab rat in the chair. She didn't like that.
0:02:40 > 0:02:42OK, let's get her settled in.
0:02:42 > 0:02:45It's great to know she's there to look after us all.
0:02:45 > 0:02:47What's she looking for now?
0:02:47 > 0:02:49I know what that is. That's her toffees.
0:02:49 > 0:02:52They're not just chewy, they're ninja-chewy.
0:02:52 > 0:02:55I started one last Christmas, finished it this morning. Let's meet
0:02:55 > 0:02:58the people trying to get into my lab today. Let's have a look at ya.
0:03:03 > 0:03:05Hold on, hold on! We're getting all excited.
0:03:05 > 0:03:08We don't know yet, they say they're the Yellow Team.
0:03:08 > 0:03:10They've got to prove it.
0:03:10 > 0:03:12A lot of people try to get into my lab.
0:03:12 > 0:03:15It's secret in here. So I've got some security checks here.
0:03:15 > 0:03:18Identify yourselves by name and I can check. Your names.
0:03:18 > 0:03:20- Toni!- Lauren!- India!
0:03:20 > 0:03:24Toni, Lauren, India. Yes, that checks out with the security file.
0:03:24 > 0:03:27Under "hidden talent," I have, India, your name.
0:03:27 > 0:03:29- What are you going to do for us, India?- Karate.
0:03:29 > 0:03:31Don't move a muscle, please!
0:03:31 > 0:03:34If Ninja Nan hears you even thinking that, it'll be terrible.
0:03:34 > 0:03:36Thank you, lab rat. Make her safe
0:03:36 > 0:03:40with the special anti-ninja tape. So you're going to demonstrate karate.
0:03:40 > 0:03:45OK, if you can do karate that will prove that you're the Yellow Team.
0:03:45 > 0:03:48Right, oh yes, OK. Well, I'd say that was karate.
0:03:48 > 0:03:52You are the Yellow Team. Come in to the Blast Lab.
0:03:57 > 0:04:00Hello, Yellow Team. Where have you all come from?
0:04:00 > 0:04:04- Bedfordshire, and we are Chemical Reaction!- No you're not!
0:04:04 > 0:04:07You're the Yellow Team. But it's great to have you here.
0:04:07 > 0:04:10Let's meet the people who claim to be the team
0:04:10 > 0:04:12you'll be playing against. Let's have a look at ya.
0:04:16 > 0:04:19This lot claim to be the Red Team.
0:04:19 > 0:04:22Your names, please, for security purposes.
0:04:22 > 0:04:24- Joe!- Connor!- Finn!
0:04:24 > 0:04:27Joe, Connor and Finn. That checks out. Under "hidden talent,"
0:04:27 > 0:04:29Finn, I've got your name. It says you play a musical instrument.
0:04:29 > 0:04:33- It's not the tuba, is it? - No.- OK, it's the violin.
0:04:33 > 0:04:35If you can play the violin, we'll let you in.
0:04:35 > 0:04:39HE PLAYS TWINKLE, TWINKLE, LITTLE STAR
0:04:42 > 0:04:45What do you reckon? Yeah. OK, the audience are nodding.
0:04:45 > 0:04:48That was playing the violin. You're cleared. Come into the Blast Lab.
0:04:54 > 0:04:56Sorry about the security checks.
0:04:56 > 0:04:59I can't let anybody in. We have to be careful.
0:04:59 > 0:05:04- Where have you all come from?- Leeds! And we are the Triplet Tornadoes!
0:05:04 > 0:05:06Wow! You actually are triplets, aren't you, as well?
0:05:06 > 0:05:08- Yeah.- You needn't have made up a name,
0:05:08 > 0:05:11because you're the Red Team, and that's that. Thank you very much.
0:05:11 > 0:05:14Right, Red Team, Yellow Team. Time to get ready for round one.
0:05:14 > 0:05:17Away you go, because that's what's coming up next.
0:05:17 > 0:05:20To help us with that, let's bring on a good friend of mine.
0:05:20 > 0:05:24His brain is full, but his petrol tank is empty cos it leaks.
0:05:24 > 0:05:26It is, of course, Oliver.
0:05:45 > 0:05:49When I fitted Oliver with his state-of-the-art, high-tech Fact Nav
0:05:49 > 0:05:54system, it really was a piece of cake to do. That's the problem.
0:05:54 > 0:05:57I think there's still some bits of cake stuck in it,
0:05:57 > 0:05:59and that's why it doesn't work very well.
0:05:59 > 0:06:01Not all the facts he comes out with are true.
0:06:01 > 0:06:04I'm going to need my two teams to tell me whether the science facts
0:06:04 > 0:06:06I give them are true or false.
0:06:06 > 0:06:08Oliver will then give us the real answer.
0:06:08 > 0:06:10If it's true, he'll do this.
0:06:10 > 0:06:12HIGH-PITCHED HORN
0:06:14 > 0:06:15And if it's false, he'll do this.
0:06:15 > 0:06:17LOW -PITCHED HORN
0:06:17 > 0:06:21OK, You're settled and comfortable? Reds, you're going first.
0:06:21 > 0:06:23I'm going to give you science fact.
0:06:23 > 0:06:25Tell me whether this is true or false.
0:06:25 > 0:06:29The loudest recorded burp was as loud as a chainsaw.
0:06:29 > 0:06:31True or false? Have a good chat amongst yourselves.
0:06:31 > 0:06:32Audience, what do we think?
0:06:32 > 0:06:35The loudest recorded burp was as loud as a chainsaw.
0:06:37 > 0:06:39What, was it one of you lot or something?
0:06:39 > 0:06:42There seems to be a lot of confidence from the audience,
0:06:42 > 0:06:44but I wouldn't always go with what they think.
0:06:44 > 0:06:46They're bright, but you might be brighter.
0:06:46 > 0:06:49- What do you reckon? - True.- Our Red Team thinks it's true.
0:06:49 > 0:06:50Oliver, is it true or false?
0:06:50 > 0:06:53HIGH-PITCHED HORN
0:06:53 > 0:06:55Yep, it's true. That's a point for the Red Team straight away!
0:06:55 > 0:06:57Well done!
0:06:59 > 0:07:02Actually, it was 104.9 decibels,
0:07:02 > 0:07:06and it was achieved by the UK's Paul Hunn.
0:07:06 > 0:07:09I don't know whether he was a sort of champion burper or what,
0:07:09 > 0:07:11but the average decibel level of a chainsaw
0:07:11 > 0:07:15is 100 decibels. So it was louder than a chainsaw. Imagine that!
0:07:15 > 0:07:17Einstein asked the same question, I'm sure.
0:07:17 > 0:07:19Yellows, this is your science fact.
0:07:19 > 0:07:22Tell me whether this is true or false.
0:07:22 > 0:07:28If you heat a diamond to 760 degrees Celsius, it'll simply vanish
0:07:28 > 0:07:30and leave pretty much nothing.
0:07:30 > 0:07:33Have a think. Audience, true or false, what do you think?
0:07:37 > 0:07:4050-50, I reckon. But Yellows, you're the ones after the point.
0:07:40 > 0:07:43You need this to equalise, or drop behind immediately. No pressure!
0:07:43 > 0:07:45So what do we think?
0:07:45 > 0:07:46False.
0:07:46 > 0:07:50OK, Yellows are going for false. Oliver, is it true or false?
0:07:50 > 0:07:51HIGH-PITCHED HORN
0:07:51 > 0:07:52No! It's true, it's true.
0:07:52 > 0:07:55I'm sorry, Yellows. No point for you there.
0:07:55 > 0:07:58It's the hardest known naturally occurring mineral, diamond,
0:07:58 > 0:08:00and they can burn in a high enough temperature
0:08:00 > 0:08:01in the presence of oxygen.
0:08:01 > 0:08:03Right, time, then, for your third question.
0:08:03 > 0:08:07This isn't a true or false. I want an actual answer to this one, OK?
0:08:07 > 0:08:10That's why you've got the boards in front of you,
0:08:10 > 0:08:12and I'm going to give the point to the team
0:08:12 > 0:08:15that gets the nearest to the actual answer, OK?
0:08:15 > 0:08:18What percentage of the air we breathe is oxygen?
0:08:18 > 0:08:22What percentage of the air we breathe is oxygen?
0:08:22 > 0:08:25OK, teams, let's have a look at your answers, please.
0:08:25 > 0:08:27Reds, you've got 40 per cent.
0:08:27 > 0:08:30OK. Yellow Team, 35 per cent.
0:08:30 > 0:08:35The actual answer is 20.95 per cent.
0:08:35 > 0:08:37The Yellows take the point and equalise!
0:08:38 > 0:08:41At the end of the first round, it's one all.
0:08:53 > 0:08:56That's all to come, but first, prepare yourselves.
0:08:56 > 0:08:58It's time for mini science.
0:08:58 > 0:09:01The teams are about to carry out scientific experiments
0:09:01 > 0:09:02with ordinary household objects,
0:09:02 > 0:09:06and to help me, I've transported my old science teacher through time
0:09:06 > 0:09:08to be with us in the Blast Lab...
0:09:08 > 0:09:10Although, something did go a bit wrong on the way.
0:09:10 > 0:09:14So please welcome my 65-year-old former teacher, Mini Miss.
0:09:17 > 0:09:20- Good day, Richard.- Good day, Miss.
0:09:20 > 0:09:23I'm really sorry about the whole, going in a time machine
0:09:23 > 0:09:25and coming out as a 10 year-old thing.
0:09:25 > 0:09:27That's not the only thing you've ever done wrong, is it?
0:09:27 > 0:09:29You never were the shiniest test tube in the rack.
0:09:29 > 0:09:31What does that mean, Miss?
0:09:31 > 0:09:34Never mind, Richard. Just get on with your work.
0:09:34 > 0:09:36OK, so what are we doing today?
0:09:36 > 0:09:39Well, today the teams are going to be tube surfing.
0:09:39 > 0:09:43- Wow! What is it?- Each team has got
0:09:43 > 0:09:4740 cardboard tubes, and the first team to go has to choose how many
0:09:47 > 0:09:51tubes they think will support all three team members' weight.
0:09:51 > 0:09:54They then have to put the amount of tubes they've chosen
0:09:54 > 0:09:56under the surfboard, and all three team members
0:09:56 > 0:09:59have to stand on the surfboard, unsupported, for five seconds.
0:09:59 > 0:10:03OK. So if none of the tubes are crushed
0:10:03 > 0:10:05it's then the other team's go.
0:10:05 > 0:10:10But the other team has to remove at least one tube to stay in the game
0:10:10 > 0:10:14and then try standing on the board themselves. So the aim is to surf on
0:10:14 > 0:10:18as few of these cardboard tubes as possible without squashing any.
0:10:18 > 0:10:20The team that does that on the fewest
0:10:20 > 0:10:21will win the game and win a point.
0:10:21 > 0:10:25- That's right.- Those are the rules. It's currently a draw, one-all.
0:10:25 > 0:10:28So we have to decide which team gets the decision to go first.
0:10:28 > 0:10:30We're going to do that using my pens.
0:10:30 > 0:10:33I'm a scientist I carry many of them.
0:10:33 > 0:10:36They're all the normal length apart from one which is the short one.
0:10:36 > 0:10:40Whichever team draws the short one, the other team gets the choice.
0:10:40 > 0:10:43Have a pen. Pick a pen. Help yourself. Very nice. Well done.
0:10:43 > 0:10:45Reds, if you'd like to pick a pen.
0:10:45 > 0:10:48If you'd like to pick a pen, Yellow team.
0:10:48 > 0:10:51Oh right, OK Reds. It's going down to the wire, this.
0:10:51 > 0:10:55Pick a pen. OK. Pick a pen.
0:10:55 > 0:10:57Oh! You see.
0:10:57 > 0:11:00- Reds you get the choice first or second?- Second.
0:11:00 > 0:11:03OK. Right now there's quite a bit of tactical thinking involved
0:11:03 > 0:11:05here so I'm going to give you a bit of time to do that.
0:11:05 > 0:11:08Teams gather around in a huddle, have a think.
0:11:08 > 0:11:10I'll give you some time to do that.
0:11:10 > 0:11:12THEY CONFER
0:11:12 > 0:11:17This is all about compression which is just a fancy word really
0:11:17 > 0:11:20for squashing things. With the tubes upright like that they've
0:11:20 > 0:11:24got vertical walls going all the way down and because it's circular in
0:11:24 > 0:11:28cross section that means if you chop the tube that way you get a circle.
0:11:28 > 0:11:30The walls go all the way round
0:11:30 > 0:11:32and the weight is spread evenly around them
0:11:32 > 0:11:36and that makes them very strong when they're squashed that way.
0:11:36 > 0:11:39If they're on their sides - the same tubes, the same amount of cardboard
0:11:39 > 0:11:43in them - but with no straight walls they'd be squashed very easily
0:11:43 > 0:11:48by the team's weight. Hopefully our two teams will work that out.
0:11:48 > 0:11:49Let's see what they go for.
0:11:49 > 0:11:51Teams, your thinking time is coming to an end.
0:11:51 > 0:11:55There was a lot of urgent planning and talking going on there.
0:11:55 > 0:11:56Have you all made your plans?
0:11:56 > 0:12:00- Yeah.- Yeah.- Yellows, you're going first. How many will you go with?
0:12:00 > 0:12:02Ten.
0:12:02 > 0:12:07Well, take ten tubes over to the board and we'll get them all set up.
0:12:10 > 0:12:13Think about how you spread the weight around most evenly...
0:12:15 > 0:12:18..bearing in mind all three of you have to stand on the board.
0:12:18 > 0:12:22Remember the more evenly the weight is spread the better it'll be.
0:12:23 > 0:12:25- Are we happy?- Yes. - We're happy with that.
0:12:25 > 0:12:28Lab rats, come in please and surf board in place.
0:12:30 > 0:12:33As soon as you're on and balanced we'll start the timer.
0:12:33 > 0:12:36You'll hear it count five seconds and you can get off. Good luck.
0:12:43 > 0:12:46- Same time.- It's tense, tense.
0:12:46 > 0:12:48Start the clock.
0:12:48 > 0:12:51Oh, I think that was a collapse. Is that a collapse?
0:12:51 > 0:12:55It is, we've lost one at the back. That's OK, what happens now is the
0:12:55 > 0:12:58Reds get a chance to set the benchmark.
0:12:58 > 0:13:01They come up with the number of tubes they think it can be done on.
0:13:01 > 0:13:04You then have the chance of doing it one less or even more less.
0:13:07 > 0:13:11- Reds, what are you going to go for? - Nine.- You don't have to go for less.
0:13:11 > 0:13:13We're trying to establish the benchmark.
0:13:13 > 0:13:18- You can go for more.- Ten.- You're going to still try for ten?- Yes.
0:13:23 > 0:13:26The important thing in this game is the structural shape of the tube is
0:13:26 > 0:13:29what enables them to bear a lot more weight than you might expect.
0:13:29 > 0:13:31So it's all about where the weight goes.
0:13:31 > 0:13:34With those walls all the way round the outside of the tube,
0:13:34 > 0:13:35the weight is spread around
0:13:35 > 0:13:38those strong vertical walls. That makes each tube stronger.
0:13:38 > 0:13:42If you arrange the tubes in the right way to spread the weight,
0:13:42 > 0:13:44it'll make the whole lot stronger.
0:13:45 > 0:13:48- Are you happy with the way you've laid those out?- Yep.
0:13:48 > 0:13:49Yellows, watch and learn
0:13:49 > 0:13:52cos if this works you have another chance to have a go.
0:13:52 > 0:13:56Lab rats, the board please. Let's go.
0:13:58 > 0:14:01Good luck, Reds. Take your time, take your time.
0:14:04 > 0:14:05Start the timer.
0:14:05 > 0:14:07TIMER TICKS
0:14:11 > 0:14:12That's your five seconds.
0:14:12 > 0:14:13Well done. Off you get, lads.
0:14:15 > 0:14:16Well done, Reds.
0:14:19 > 0:14:20Hello, Yellows.
0:14:20 > 0:14:23- Hello.- No pressure, but they've just done it with ten
0:14:23 > 0:14:27so you've got to do it with less. It's up to you.
0:14:27 > 0:14:29- We'll do it with nine then.- Nine?
0:14:29 > 0:14:30- Yes.- Come on then.
0:14:41 > 0:14:44With each tube it's about where the weight goes.
0:14:44 > 0:14:47With those strong vertical walls spreading it all the way around,
0:14:47 > 0:14:50the structure of each tube is sound - it will hold the weight.
0:14:50 > 0:14:51They then have to think about
0:14:51 > 0:14:54the structure of the whole group of tubes -
0:14:54 > 0:14:57where does the weight go around between them all?
0:14:57 > 0:15:00Effectively they're making another structure out of tubes.
0:15:05 > 0:15:08Yellows, are you happy with your formation?
0:15:08 > 0:15:12- Yes.- Yes.- Yeah? OK, lab rats.
0:15:18 > 0:15:21Yellows, remember this is it - fail this time, they've set the
0:15:21 > 0:15:25benchmark at ten, you're out and the point goes to them and we move on.
0:15:25 > 0:15:28OK? It will be the end of the game.
0:15:30 > 0:15:32- Its twisting.- Try forward a bit.
0:15:32 > 0:15:35We'll start the timer as soon as you're all on board
0:15:35 > 0:15:37and surfing all three together.
0:15:37 > 0:15:40OK. They're on, start the timer, please.
0:15:40 > 0:15:41Don't lean.
0:15:41 > 0:15:43TIMER TICKS
0:15:45 > 0:15:48There you go, well done, Yellows! You're still in.
0:15:49 > 0:15:51You're still in the game.
0:15:54 > 0:15:56The pressure is on, Reds - they did it.
0:15:56 > 0:15:59- What are you going to go for?- Six. - Yeah?- Yeah.
0:15:59 > 0:16:00OK.
0:16:06 > 0:16:09- Right, you're happy with your formation then, Reds?- Yes.
0:16:09 > 0:16:12Lab rats can we have the board in place please. Let's see if the
0:16:12 > 0:16:17three members of Red team can surf on just six cardboard tubes.
0:16:17 > 0:16:21That's just two supporting each of you, remember.
0:16:21 > 0:16:25So under each of you there's just two little cardboard tubes.
0:16:25 > 0:16:26Start the clock.
0:16:26 > 0:16:28TIMER TICKS
0:16:32 > 0:16:34Wow, the Reds.
0:16:36 > 0:16:39Looking rock steady there, boys. Really steady.
0:16:41 > 0:16:44- Five?- Yeah.
0:16:44 > 0:16:46- Five. I've got two.- Come on then.
0:16:55 > 0:16:59- Are we happy then, team?- Yes.- Lab rats let's have the board on please.
0:16:59 > 0:17:01We're going with five now.
0:17:01 > 0:17:04That's less than two each to support their weight.
0:17:07 > 0:17:10Good luck. We'll start the clock as soon as all three are on.
0:17:16 > 0:17:17Go.
0:17:17 > 0:17:22Oh, I think we've had a crush. We have.
0:17:22 > 0:17:26Yellows, I'm sorry that means the point goes to the Red team.
0:17:29 > 0:17:33Which brings the total scores now,
0:17:33 > 0:17:362-1 to the Reds at the end of that round.
0:17:37 > 0:17:39Right, well done.
0:17:39 > 0:17:44Sorry, Yellows. So cardboard seems to be pretty strong.
0:17:44 > 0:17:46What if we use paper instead?
0:17:46 > 0:17:49I wonder just how strong that could be?
0:17:52 > 0:17:54Today in one of my top secret test facilities my lab rats
0:17:54 > 0:17:59are trying to discover just how strong paper can be.
0:18:06 > 0:18:09First up we're gonna find out if paper can be used
0:18:09 > 0:18:14to protect what's most important in life - eggs and melons.
0:18:15 > 0:18:18Our lab rat here is mixing a solution of wallpaper paste
0:18:18 > 0:18:22and paper to make something called papier-mache.
0:18:22 > 0:18:25He's coating eggs and melons with the paper
0:18:25 > 0:18:27and then leaving them to harden,
0:18:27 > 0:18:30the idea being that the hardened paper coating
0:18:30 > 0:18:33will protect the valuable foodstuffs if they fall from a height.
0:18:33 > 0:18:35Let's drop them and find out.
0:18:35 > 0:18:36# Shut up and let me go... #
0:18:38 > 0:18:39# Hey! #
0:18:40 > 0:18:42Let's see what state he's in.
0:18:44 > 0:18:45Ah, slightly scrambled I'd say.
0:18:45 > 0:18:48Maybe we'll have more luck with the melon.
0:18:53 > 0:18:56Amazing, practically unharmed.
0:18:56 > 0:18:58Well, it seems paper's not
0:18:58 > 0:19:01looking very strong so far.
0:19:05 > 0:19:07So, limited success thus far
0:19:07 > 0:19:11but I think we should take it to the next level.
0:19:11 > 0:19:15The lab rats are going to use this huge piece of paper and some science
0:19:15 > 0:19:19to create a bridge that will enable them to
0:19:19 > 0:19:23cross a swimming pool... without falling in.
0:19:28 > 0:19:30Lab rats are stupid creatures bred
0:19:30 > 0:19:35exactly for this sort of thing, we know you'd never do this at home.
0:19:35 > 0:19:39Real bridges are designed to spread out the weight of their load.
0:19:39 > 0:19:42Here with our paper bridge the weight'll be spread out
0:19:42 > 0:19:46down the zigzags of the folds and over a large area of the paper.
0:19:47 > 0:19:50By spreading out the load in this way
0:19:50 > 0:19:53the paper should be able to take a fair bit of weight.
0:19:53 > 0:19:56So, will it be able to support the weight of our lab rat
0:19:56 > 0:19:59or will he take an early bath?
0:19:59 > 0:20:03With the hard work done and the bridge in place, it all comes down
0:20:03 > 0:20:05to one lab rat's quest for glory.
0:20:05 > 0:20:08But will the paper save him from getting his feet wet?
0:20:11 > 0:20:13OK. Hold the experiment, because there's an extra
0:20:13 > 0:20:18point in this. The scores right now, 2-1 to the Reds. Yellows, this is a
0:20:18 > 0:20:21chance to equalise which means you'll go in to the Messy Mess
0:20:21 > 0:20:25Test with no advantage to the Reds, you'll all start at the same time.
0:20:25 > 0:20:27The question I'm going to ask is, does it work?
0:20:27 > 0:20:30Will that paper bridge support my lab rat's weight?
0:20:30 > 0:20:34- What do you think, is it going to hold his weight or not?- No.- No?
0:20:34 > 0:20:37- Reds?- Yeah.- What's your answer?
0:20:37 > 0:20:38- It won't break.- It won't break?
0:20:38 > 0:20:42So, Yellows think it won't work, Reds think it will work.
0:20:42 > 0:20:44Let's find out what happens.
0:20:49 > 0:20:53His whole life has built to this moment.
0:20:53 > 0:20:57One lab rat's chance of immortality.
0:20:59 > 0:21:03Brilliant. A complete disaster.
0:21:08 > 0:21:10There you go. Quite clearly it didn't work,
0:21:10 > 0:21:12which means a points the Yellow Team. So it's now 2-2.
0:21:12 > 0:21:15APPLAUSE
0:21:18 > 0:21:21Actually, unusually, my lab rat was
0:21:21 > 0:21:23being quite clever there. He was right.
0:21:23 > 0:21:25We were talking about the structure.
0:21:25 > 0:21:28The corrugations. That is strong, changing the paper structure
0:21:28 > 0:21:30or making a structure out of the
0:21:30 > 0:21:33paper, those corrugated shapes, may well have supported the lab
0:21:33 > 0:21:36rat's weight if it distributed it evenly across the bridge.
0:21:36 > 0:21:39If he'd lain down on it, it would have worked. But he went...
0:21:39 > 0:21:42Stuck his foot down. And he went straight through.
0:21:42 > 0:21:43Both teams on 2-2.
0:21:43 > 0:21:47If you'd like to get off now and get changed ready for the Messy
0:21:47 > 0:21:52Messy Mess Test, because that's what we're moving on to right now. And...
0:21:52 > 0:21:54Oh, that's...
0:21:54 > 0:21:57quite annoying. Sorry, audience. You see, my lab is powered by
0:21:57 > 0:22:01a water wheel outside and occasionally it breaks down.
0:22:01 > 0:22:04But it's OK, I've been working on something here.
0:22:04 > 0:22:08Lab rat, perfect. Yes. Is that on nice and sound? Good.
0:22:08 > 0:22:10I'm not even going to explain how this works,
0:22:10 > 0:22:12because it's immensely complicated.
0:22:12 > 0:22:15This windmill, hold that in your little paw. Blow.
0:22:15 > 0:22:17There you go.
0:22:17 > 0:22:19Keep blowing, keep blowing.
0:22:19 > 0:22:21There you go. Perfect. You see?
0:22:21 > 0:22:23It's extracting the energy
0:22:23 > 0:22:25from the top of its head that... It's very complicated.
0:22:25 > 0:22:29It could solve all the world's power problems but it would take
0:22:29 > 0:22:31too long to explain. Just keep blowing.
0:22:31 > 0:22:33Don't stop. Don't stop! Keep going.
0:22:33 > 0:22:38Right. Let's move on to the Messy Messy Mess Test.
0:22:40 > 0:22:42Which today is the Bridge of Destiny.
0:22:42 > 0:22:45- DEEP VOICE:- The Bridge of Destiny. - Yeah.
0:22:45 > 0:22:48Your prizes, like an MP3 player, a bionic copter
0:22:48 > 0:22:52and Hot Wheels Trick Track need to be transported across this tank
0:22:52 > 0:22:54of hideous, toxic gunge.
0:22:54 > 0:22:57If they fall in they'll be useless, because
0:22:57 > 0:23:01they'll melt in the hideous toxic gunge you're standing in. To do
0:23:01 > 0:23:03this, you will need to construct your own Bridge of Destiny.
0:23:03 > 0:23:06- HIGH VOICE:- The Bridge of Destiny.
0:23:06 > 0:23:10And then use it to get from one side to the other.
0:23:10 > 0:23:13All the bits you need for your bridge are in the gunge with you.
0:23:13 > 0:23:18Unless some of the hideous, slithering, biting eel-like
0:23:18 > 0:23:22creatures I've seen in here have eaten... Don't worry, it'll be fine.
0:23:22 > 0:23:25All you do is feel in the toxic gunge, find all the
0:23:25 > 0:23:28pieces you need and assemble your bridge before your prizes
0:23:28 > 0:23:31are lost in the yawning chasm below your Bridge of Destiny.
0:23:31 > 0:23:35- DEEP AND HIGH VOICES: - The Bridge of Destiny.
0:23:35 > 0:23:37When you finish your bridge,
0:23:37 > 0:23:40pull the lever to release the car, pulling your trailer-full
0:23:40 > 0:23:41of prize pods across.
0:23:41 > 0:23:44Yellows, you clawed it back in that last round. Well done.
0:23:44 > 0:23:47It's a draw, that means neither team has the advantage.
0:23:47 > 0:23:50You're both going to start at the same time.
0:23:50 > 0:23:53A straight race to get your prize pods across the tank.
0:23:53 > 0:23:57And that race starts... Boy, are these teams ready.
0:23:57 > 0:23:59Look at that. That race starts...
0:23:59 > 0:24:01now!
0:24:01 > 0:24:04CHEERING
0:24:04 > 0:24:08So, both teams set off together on their bridge-building adventure.
0:24:08 > 0:24:12Lots of activity, lots of enthusiasm.
0:24:12 > 0:24:17But not a huge amount of actual progress as of yet.
0:24:17 > 0:24:21The Yellows are enjoying themselves, having the time of their lives.
0:24:21 > 0:24:24They don't seem to realise there's serious business afoot here.
0:24:24 > 0:24:27A piece in place. That's better.
0:24:30 > 0:24:33The Reds having some difficulties there.
0:24:33 > 0:24:37But if we look to the plan view, the teams are currently neck and neck.
0:24:41 > 0:24:43Nail-biting stuff poolside today.
0:24:43 > 0:24:45It's anyone's race.
0:24:45 > 0:24:47Or is it the Yellow's race?
0:24:47 > 0:24:52Another piece going in and they are looking supremely confident.
0:24:53 > 0:24:56It's all Yellows now, with every piece they put in place
0:24:56 > 0:25:00the pressure mounts on the Reds, who seem to have gone into meltdown.
0:25:00 > 0:25:03The Yellows showboating now.
0:25:03 > 0:25:07They have an almost sixth sense for exactly what piece is needed and
0:25:07 > 0:25:10where. It is a privilege to be here today, watching a team operating
0:25:10 > 0:25:13at this level. Beautiful stuff.
0:25:13 > 0:25:15The Reds are frantic, whilst the
0:25:15 > 0:25:21Yellows are jubilant as they pull the lever to start the prize car.
0:25:21 > 0:25:24A convincing win there for the in-form team of the day.
0:25:24 > 0:25:26Poor Reds never stood a chance.
0:25:26 > 0:25:28KLAXON SOUNDS
0:25:28 > 0:25:32Well, it was a straight race and the Yellow Team are the winners.
0:25:32 > 0:25:36You have won... Are you ready Nan?
0:25:36 > 0:25:38A Hot Wheels Trick Track.
0:25:38 > 0:25:40An electronic project kit.
0:25:40 > 0:25:42Crystal growing kit.
0:25:42 > 0:25:45Bionic copter.
0:25:45 > 0:25:4720 Questions game.
0:25:47 > 0:25:50An MP3 player.
0:25:50 > 0:25:55For each of the Yellow Team, because they are the winners. Well done.
0:25:55 > 0:25:58Reds...
0:25:58 > 0:26:00You would have won all of that. Unfortunately,
0:26:00 > 0:26:04you have to blow your prizes up instead of taking them home, because
0:26:04 > 0:26:06now it's time for Bidet Goes Bang.
0:26:15 > 0:26:17It's the funniest thing as we stand here.
0:26:17 > 0:26:19The Yellow Team look really happy behind this big
0:26:19 > 0:26:22wheelbarrow full of prizes that you're taking home with you.
0:26:22 > 0:26:25Well played, well won. You must be delighted.
0:26:25 > 0:26:30- Yeah.- Good. The Reds, by contrast, a different mood from this team.
0:26:30 > 0:26:32How are you feeling, guys?
0:26:32 > 0:26:34- Disappointed. - Nice way of putting it.
0:26:34 > 0:26:36- What went wrong? - Couldn't find the pieces.
0:26:36 > 0:26:39- We couldn't do it in time. - It was close.
0:26:39 > 0:26:40Did that make it worse?
0:26:40 > 0:26:42- Yes.- I thought it might do. OK.
0:26:42 > 0:26:45Got to decide who'll push the plunger. Which one of you?
0:26:45 > 0:26:47- All of us.- Share the blame, I think that's the best.
0:26:47 > 0:26:49I like to end the show with a bang.
0:26:49 > 0:26:53Although the losing team aren't really with me on that one, because
0:26:53 > 0:26:56it is their prizes that are going to go bang in my exploding bidet.
0:26:56 > 0:26:58Those prizes are loaded in.
0:26:58 > 0:27:00If you step forwards, if all three of you
0:27:00 > 0:27:03do the plunge, lift the plunger into position.
0:27:03 > 0:27:06Don't put it down yet cos we're going to give you a countdown.
0:27:06 > 0:27:08Are we ready?
0:27:08 > 0:27:125, 4, 3, 2, 1.
0:27:15 > 0:27:18Well, there you go. That's all we've got time for today.
0:27:18 > 0:27:22We've had a great time investigating the strength of structures.
0:27:22 > 0:27:24My lab rats are about to learn all about
0:27:24 > 0:27:26the strength of another structure - my lab.
0:27:26 > 0:27:30Cos they're not getting out until they've scrubbed this floor. Bye!
0:27:30 > 0:27:33CHEERING AND APPLAUSE
0:27:36 > 0:27:40Blast Lab was recorded before a live studio audience.
0:27:40 > 0:27:43No lab rat was harmed during the filming.
0:27:43 > 0:27:46Mind you, I have to send a few on the health and safety course
0:27:46 > 0:27:48at my kaboom-iversity.
0:27:48 > 0:27:51Subtitles by Red Bee Media Ltd
0:27:51 > 0:27:54E-mail subtitling@bbc.co.uk