0:00:34 > 0:00:39So, does your foot now fill that boot?! It fits. So, you can feel
0:00:39 > 0:00:44the end of your toes? Brilliant! It works! Been tinkering with my new
0:00:44 > 0:00:48sizulating machine. It's fabulous. Now, I just have to
0:00:48 > 0:00:51invent another machine to reverse the process. Anyway,
0:00:51 > 0:00:55I'm Richard Hammond. Welcome to my Blast Lab!
0:00:55 > 0:00:56APPLAUSE
0:00:57 > 0:01:03This is the show that puts science and fun together,
0:01:03 > 0:01:07to make...fience. In a few moments, we'll meet two teams
0:01:07 > 0:01:11of young scientists, who will complete in scientific contests
0:01:11 > 0:01:14to win prizes. Let's see what's in store.
0:01:26 > 0:01:29Now, because this lab is rated super
0:01:29 > 0:01:33secret, and a lot of the experiments I do in here are very, very
0:01:33 > 0:01:37dangerous, it's usually guarded around the clock by a team of
0:01:37 > 0:01:42SAS officers. Unfortunately, tonight it's the annual SAS jumble sale,
0:01:42 > 0:01:46and they've all had to go get ready. You might want
0:01:46 > 0:01:50to get down yourself later and pick up a second-hand balaclava.
0:01:50 > 0:01:54But don't worry, because I have drafted in a replacement.
0:01:54 > 0:01:59A woman who's no stranger to danger. Or, indeed, to jumble sales.
0:01:59 > 0:02:01It is my Ninja Nan.
0:02:01 > 0:02:03APPLAUSE
0:02:09 > 0:02:11Ninja Nan, thanks for standing in.
0:02:11 > 0:02:16I know she does look fragile, but she's actually a trained ninja.
0:02:19 > 0:02:22See? Nan, if you'd like to take your place in
0:02:22 > 0:02:27security, please. Nan, nan! If you'd like to take your place in security.
0:02:27 > 0:02:30Away she goes. Look at her! At ninja speed.
0:02:30 > 0:02:35There she goes. In her spare time, she likes to wrestle cheetahs.
0:02:35 > 0:02:38Pinning them down isn't the hard bit, it's catching them.
0:02:38 > 0:02:42But as you can see, for her, it's no problem at all.
0:02:42 > 0:02:46She's still travelling. It's further than it looks!
0:02:46 > 0:02:49Ninja Nan, are you there yet? There she is.
0:02:49 > 0:02:53You see, that's her special ninja tartan shopping trolley
0:02:53 > 0:02:57and her ninja chair. What's she got? It's a photograph.
0:02:57 > 0:03:02Oh, look! That's her from wrestling. I think that's last week's fight.
0:03:02 > 0:03:07She won. Right, let's meet the people trying to get into my lab.
0:03:07 > 0:03:09APPLAUSE AND CHEERING
0:03:11 > 0:03:13You get all excited.
0:03:13 > 0:03:17We don't know - they could be anybody trying to get into my
0:03:17 > 0:03:20lab. You say you're the yellow team?
0:03:20 > 0:03:24- Identify yourselves by name, please. What are your names?- Ruby.- Leila.
0:03:24 > 0:03:30- William.- That checks out with the security file I have.
0:03:30 > 0:03:34Hidden talent is the next thing on the security file.
0:03:34 > 0:03:36ALL: We're all doing karate.
0:03:36 > 0:03:41All doing karate? No, wait! Don't move a muscle. Hold still.
0:03:41 > 0:03:45Lab rats, make Ninja Nan safe, please. Honestly,
0:03:45 > 0:03:48if she'd picked up a thought about karate,
0:03:48 > 0:03:53there would have been a terrible scene. Right, you're now safe.
0:03:53 > 0:03:59Demonstrate your karate, please. ALL: 1, 2, 3. Hi-ya!
0:03:59 > 0:04:01Wow! Synchronised karate.
0:04:01 > 0:04:04OK. Well, I think that'll do. I think you're clear!
0:04:04 > 0:04:07Come into the lab.
0:04:07 > 0:04:09APPLAUSE AND CHEERING
0:04:09 > 0:04:14That confirms it. William, Leila, Ruby. You are the Yellow Team.
0:04:14 > 0:04:16Sorry about the security.
0:04:16 > 0:04:22- Where are you from?- ALL: Bournemouth and we are the Smarticles. Yo!
0:04:22 > 0:04:26Yo? No, you're the Yellow Team. But it is lovely to have you here.
0:04:26 > 0:04:30Now, we meet the people who claim to be your opponents.
0:04:30 > 0:04:32APPLAUSE AND CHEERING
0:04:32 > 0:04:36Let's just not get too excited until we're sure.
0:04:36 > 0:04:41OK, you say you're the Red Team. Identify yourselves by name.
0:04:41 > 0:04:46- Sam.- Matt.- Josh. - Sam, Matt and Josh. Fair enough.
0:04:46 > 0:04:50Hidden talent, Josh, I've got your name down here.
0:04:50 > 0:04:52What are you going to do?
0:04:52 > 0:04:53I'm going to fence.
0:04:53 > 0:04:57That's not like build a fence, is it? That's with a sword.
0:04:57 > 0:05:00Fortunately, Ninja Nan is restrained,
0:05:00 > 0:05:04so you are safe to demonstrate what you can do. Show us.
0:05:04 > 0:05:07All right. En garde! That's the salute.
0:05:07 > 0:05:11Oh! Fantastic. As long as there wasn't a lab rat
0:05:11 > 0:05:16standing on the other side there, I think you're cleared through.
0:05:16 > 0:05:18APPLAUSE AND CHEERING
0:05:22 > 0:05:26Well done, Josh. Hello, team. Where are you from?
0:05:26 > 0:05:30ALL: Guildford. And we're the Combustibles!
0:05:30 > 0:05:32You're not. You're the Red Team.
0:05:32 > 0:05:36But welcome to Blast Lab. So, we've met both teams.
0:05:36 > 0:05:38Now, we start round one.
0:05:38 > 0:05:41You guys go get ready for round one.
0:05:41 > 0:05:46Now, he knows every square root and has a spare tyre in his boot.
0:05:46 > 0:05:47It is Oliver!
0:06:02 > 0:06:04APPLAUSE AND CHEERING
0:06:04 > 0:06:06I've fitted Oliver
0:06:06 > 0:06:10with a Fact Nav system. It's very clever, but it's not one of those
0:06:10 > 0:06:15fancy new ones where all the facts are correct. Oh no! Quite a lot of
0:06:15 > 0:06:19the ones in this system are wrong. So I want the two teams to tell me
0:06:19 > 0:06:24whether my facts are true or false. Oliver will then reveal the answer.
0:06:24 > 0:06:26If it's true, he'll honk.
0:06:26 > 0:06:27HONKING, ALARM TRILLS
0:06:27 > 0:06:31If it's false, he'll let us know by doing this...
0:06:31 > 0:06:33FOG HORN BLASTS
0:06:33 > 0:06:37So, the rules are simple. Teams, this is your first chance
0:06:37 > 0:06:41to earn points in Blast Lab. Are you all feeling settled?
0:06:41 > 0:06:46Feeling clever? I do hope so. Right, here comes the first fact.
0:06:46 > 0:06:49Reds, you go first here. Here is your science fact.
0:06:49 > 0:06:53Tell me if it's true or false. If all the data on a CD was
0:06:53 > 0:07:00stretched out in a single line, it would be 3.5 miles long. Have a
0:07:00 > 0:07:03think. I'm going to ask the audience. What
0:07:03 > 0:07:09do we think? Is that true or false? OK, I reckon mostly true there from
0:07:09 > 0:07:15the audience. But, you know, you're the experts. I wouldn't just believe
0:07:15 > 0:07:18them. They're bright, but what do you think?
0:07:18 > 0:07:22- We think true.- Our red team thinks true. Oliver, is it true or false?
0:07:22 > 0:07:24HONKING, ALARM TRILLS
0:07:24 > 0:07:27It's indeed true. That's a point to the Reds!
0:07:27 > 0:07:29CHEERING
0:07:29 > 0:07:33It's because CDs work by storing the date on a spiral.
0:07:33 > 0:07:37It starts in the centre of the CD and then spirals its way out
0:07:37 > 0:07:42counter-clockwise, so that's that... wait - no, THAT way to the edge. And
0:07:42 > 0:07:47it's just 0.5 of a micron wide. That's really small. And if you
0:07:47 > 0:07:52stretch it out, it would be 5.6 kilometres, which is 3.5 miles.
0:07:52 > 0:07:57I worked that out in my head. Honest. Yellow Team, your fact.
0:07:57 > 0:08:00True or false? Oil is made from the remains
0:08:00 > 0:08:03of plants and animals that lived millions of years ago.
0:08:03 > 0:08:08Talk it through. Audience, what do you think? Oil is made from the
0:08:08 > 0:08:13remains of plants and animals that lived thousands of years ago.
0:08:13 > 0:08:15SHOUTING
0:08:15 > 0:08:20- Most of the audience going for true there.- True.- You think it's true.
0:08:20 > 0:08:22Oliver, is it true or false?
0:08:22 > 0:08:24HONKING, ALARM TRILLS
0:08:24 > 0:08:25It's true!
0:08:25 > 0:08:26CHEERING
0:08:26 > 0:08:30Well done. Crude oil, coal, gas - they're all fossil fuels
0:08:30 > 0:08:34and they're all formed millions of years ago from the remains of dead
0:08:34 > 0:08:39organisms. Right, third question. This one isn't true or false,
0:08:39 > 0:08:43I need an actual answer. So, get ready for some thinking.
0:08:43 > 0:08:46Write your answers down on your boards. They're
0:08:46 > 0:08:49not always easy, so I will give the points
0:08:49 > 0:08:53to the team that gets closest to the answer. OK.
0:08:53 > 0:08:59How many minutes does it take light to get from the Sun to Earth?
0:08:59 > 0:09:04How many minutes does it take light to get from the Sun to the Earth?
0:09:04 > 0:09:08I'll give you time to think. I'll ask the audience. Anybody?
0:09:08 > 0:09:12Right. I'm going to talk to you with this invention I made.
0:09:12 > 0:09:16It's a boot, but it's actually a microphone.
0:09:16 > 0:09:20It's a boot-microphone combination. Are you impressed?
0:09:20 > 0:09:23- Yes.- You aren't really, do you?- No!
0:09:23 > 0:09:28- How many minutes does it take light to reach us?- Eight minutes.
0:09:28 > 0:09:31Audience? Anybody else? Any other views? Let's ask.
0:09:31 > 0:09:35- What do we think?- Eight minutes. - Eight minutes.
0:09:35 > 0:09:39- That seems to be the general answer. - Eight minutes!- OK, now we're all
0:09:39 > 0:09:44saying eight minutes. Anybody got a different answer? Let's see.
0:09:44 > 0:09:48- Six minutes.- Six minutes, OK. - I don't know the minutes,
0:09:48 > 0:09:52- but I think it's eight days. - Eight days. My microphone boot -
0:09:52 > 0:09:57you're amazed, aren't you? If that was in the shops, you'd want one.
0:09:57 > 0:10:00Well, I think about three to four minutes.
0:10:00 > 0:10:03Three to four minutes? Anybody got any different answers?
0:10:03 > 0:10:09- What do you say?- Five minutes and six milliseconds.
0:10:09 > 0:10:12I like that sort of precision in Blast Lab.
0:10:12 > 0:10:13We like that sort of precision.
0:10:13 > 0:10:16Quite a range of answers from the audience.
0:10:16 > 0:10:20Let's find out what our teams think. They're competing for points.
0:10:20 > 0:10:24Have both teams written down announce run your boards?
0:10:24 > 0:10:28Yellows? Take your time, have a good chat.
0:10:28 > 0:10:31Eight minutes from the Yellows. Reds, turn your board round, please.
0:10:31 > 0:10:34Three minutes. The real answer is
0:10:34 > 0:10:378.3 minutes.
0:10:37 > 0:10:38The point goes to the Yellows.
0:10:38 > 0:10:42CHEERING AND APPLAUSE
0:10:42 > 0:10:45The Sun, of course, is enormous.
0:10:45 > 0:10:49if you think of the Sun as a basketball, next to that,
0:10:49 > 0:10:53the Earth would only be the size of a pinhead. Makes you feel small.
0:10:53 > 0:10:56Here are the scores:
0:11:08 > 0:11:10CHEERING AND APPLAUSE
0:11:10 > 0:11:13That's all to come. Now, it's time for Mini Science.
0:11:13 > 0:11:17This is the round where our teams use household objects to conduct
0:11:17 > 0:11:19incredible experiments.
0:11:19 > 0:11:22For this round, we need some expertise.
0:11:22 > 0:11:27I made a time machine to bring my 65-year-old science teacher
0:11:27 > 0:11:29here to Blast Lab and help.
0:11:29 > 0:11:32But the time machine turned out to be as reliable as my lab rats
0:11:32 > 0:11:35and she stepped out of it as a ten-year-old.
0:11:35 > 0:11:36I'm talking about Mini Miss!
0:11:36 > 0:11:38CHEERING AND APPLAUSE
0:11:41 > 0:11:45- So, what are we doing today? - We're looking at convection.
0:11:45 > 0:11:47- Yes, of course.
0:11:47 > 0:11:50Hot air is more spread out than cold air so that makes it lighter.
0:11:50 > 0:11:54If you blew hot air into a bag,
0:11:54 > 0:11:57it would inflate and lift it up into the air.
0:11:57 > 0:12:00- Hold here.- Yes, Miss.
0:12:00 > 0:12:02HAIRDRYER WHIRS
0:12:02 > 0:12:06That's hot air going in and that makes the bag rise up because
0:12:06 > 0:12:10the hot air is more spread out and the cold air is lighter.
0:12:10 > 0:12:11OK. I get that.
0:12:11 > 0:12:16- When you turn the hot air off, the air then cools and it deflates.- OK.
0:12:16 > 0:12:20The name of the game today is Balloon Limbo.
0:12:20 > 0:12:25The aim of the game is to get those bags over an obstacle
0:12:25 > 0:12:26by guiding them with hot air.
0:12:26 > 0:12:30This is what you've got to do. Each of you has one of these bags.
0:12:30 > 0:12:33Two team players will move this along these wires.
0:12:33 > 0:12:36The third one will provide the heat with the hairdryer.
0:12:36 > 0:12:40You inflate the bag. That makes the bag rise up.
0:12:40 > 0:12:43Hot air, remember, more spread out and cold, so it rises up.
0:12:43 > 0:12:47Then, you come to the next obstacle so you stop putting hot air in.
0:12:47 > 0:12:50It cools and it'll drop down and youcan get under the next one.
0:12:50 > 0:12:55Do not touch these obstacles. If you do, you'll incur a time penalty.
0:12:55 > 0:12:59Inflate the bag again to get over the obstacle and you get to the end.
0:12:59 > 0:13:03Then, it's the return leg. Over this obstacle here.
0:13:03 > 0:13:05Real hot air balloons work the same way.
0:13:05 > 0:13:10You put the hot air in. They use big burners, not hairdryers.
0:13:10 > 0:13:14The hot air then is more spread out than cold air so it rises up.
0:13:14 > 0:13:15We do the same.
0:13:15 > 0:13:19You come to the next obstacle, let it cool, let it go underneath.
0:13:19 > 0:13:21Not touching them, you'll get a time penalty.
0:13:21 > 0:13:25Over the last one and hit the barrier at the end.
0:13:25 > 0:13:27Right, this is a straight race.
0:13:27 > 0:13:30May the best team win, without time penalties.
0:13:30 > 0:13:34Five, four, three, two, one. Go!
0:13:35 > 0:13:38Both teams bursting into life.
0:13:38 > 0:13:42One thought in their minds - ending up on the winning side.
0:13:47 > 0:13:50Amazing control on display here.
0:13:50 > 0:13:53Absolute concentration on the faces of all concerned.
0:13:53 > 0:13:57No-one wants to be responsible for incurring any time penalties.
0:13:57 > 0:14:00They know that one slip could cost them the game.
0:14:00 > 0:14:02SHOUTING
0:14:02 > 0:14:03Up, Up, Up!
0:14:07 > 0:14:09Reds look like they're in the driving seat
0:14:09 > 0:14:12with Yellows operating a safety-first technique.
0:14:12 > 0:14:14Who will come out on top?
0:14:16 > 0:14:20The Reds start their return journey but the Yellows have closed the gap.
0:14:20 > 0:14:23It's impossible to separate them now.
0:14:23 > 0:14:26This is probably the most tense game of using a hairdryer to
0:14:26 > 0:14:29fill a bag with hot air and race over an obstacle course
0:14:29 > 0:14:32I've seen all day! Great stuff!
0:14:34 > 0:14:36CHEERING
0:14:36 > 0:14:40Keep going, yellows! It's not over yet.
0:14:40 > 0:14:42Yellows! Yellows! Yellows!
0:14:42 > 0:14:44OK, that's it.
0:14:44 > 0:14:45CHEERING
0:14:45 > 0:14:48Right. Both team join me and Mini Miss.
0:14:48 > 0:14:54We need to work out the scores. Reds, you did finish first.
0:14:54 > 0:14:56Yellows, you finished second.
0:14:56 > 0:15:00The difference was nine seconds.
0:15:00 > 0:15:03But this is before we work out the time penalty.
0:15:03 > 0:15:07Yellows, you finished second by nine seconds.
0:15:07 > 0:15:11What we have to do now is add on to that time your time penalties.
0:15:11 > 0:15:15How many time penalties? Two time penalties, five seconds each.
0:15:15 > 0:15:17That takes you to 19 in total.
0:15:17 > 0:15:19Reds, you were first to finish, so no penalties.
0:15:19 > 0:15:25If they've got four time penalties, they've lost, so 19 to beat.
0:15:25 > 0:15:28Lab rat, how many time penalties? One.
0:15:28 > 0:15:30That's five. The Red Team wins!
0:15:35 > 0:15:38Our teams were using the heat from a hairdryer
0:15:38 > 0:15:41to make the air hotter and make it rise up.
0:15:41 > 0:15:46What if we used something else for the heat? What about using the sun?
0:15:46 > 0:15:50Making a hot air balloon may sound tricky.
0:15:50 > 0:15:53But if you're one of my lab rats, you can cobble one together
0:15:53 > 0:15:56using sticky tape and bin liners. Lots of them.
0:15:59 > 0:16:04Ah, yes. No-one should ever play with plastic bags.
0:16:04 > 0:16:07But these are highly trained lab rats and are responsible.
0:16:07 > 0:16:09For lab rats, anyway.
0:16:12 > 0:16:15A solar balloon is only filled with ordinary air
0:16:15 > 0:16:18but takes a lot of puff to inflate.
0:16:18 > 0:16:21To hold the air in, we'll need a vacuum seal.
0:16:21 > 0:16:22Or a bit of string.
0:16:23 > 0:16:26Our balloon is a solar balloon and
0:16:26 > 0:16:30relies solely on the sun to help it rise into the air.
0:16:30 > 0:16:34The dark colour of the bin liners helps absorb the sun's energy
0:16:34 > 0:16:38and heat up the air inside the balloon. As this air heats up,
0:16:38 > 0:16:42it expands and becomes more spread out than the surrounding cold air.
0:16:42 > 0:16:48As it's more spread out, it becomes lighter and so the balloon floats.
0:16:51 > 0:16:55It takes a bit of time for the sun's rays to work their magic.
0:16:55 > 0:16:58Especially when you pick a cloudy day.
0:17:02 > 0:17:05But will you look at that?! It's actually working!
0:17:05 > 0:17:11# Would you like to ride in my beautiful balloon?
0:17:11 > 0:17:14# Would you like to ride in my... #
0:17:14 > 0:17:17It's not very balloon-shaped but it sort of floats,
0:17:17 > 0:17:20with a bit of loving encouragement from our lab rats.
0:17:20 > 0:17:22# ..You and I
0:17:22 > 0:17:27# For we can fly... #
0:17:27 > 0:17:30Look at them run and play! Sweet!
0:17:30 > 0:17:36# Up and away in my beautiful, my beautiful balloon... #
0:17:36 > 0:17:40We've tested the theory but what if we made the balloon bigger?
0:17:41 > 0:17:44Ten times bigger.
0:17:46 > 0:17:50We've cleaned a shop out of bin bags but to inflate this monster,
0:17:50 > 0:17:52we'll need serious blowing.
0:17:54 > 0:17:58Hmm. Hairdryers weren't what I had in mind.
0:18:02 > 0:18:05Remember, these are highly-trained lab rats.
0:18:05 > 0:18:09Never cover yourself with a bin bag like they're doing here.
0:18:09 > 0:18:14A quick check for holes and we're ready for takeoff.
0:18:14 > 0:18:17Hold the experiment there. There's an extra point in this.
0:18:17 > 0:18:21We need it because it's 2-2. This could make all the difference.
0:18:21 > 0:18:24You'll get that point if you can tell me correctly,
0:18:24 > 0:18:27does the big balloon fly or not?
0:18:27 > 0:18:30Have a talk, have a think. I'll ask the audience as well.
0:18:30 > 0:18:32Any theories?
0:18:32 > 0:18:36I'll come and talk to you using my amazing microphone boot.
0:18:36 > 0:18:39You are impressed? Come on, you are!
0:18:39 > 0:18:45- What's your theory?- No.- You think not? Anybody disagree?
0:18:45 > 0:18:47- I think it will.- What do we think down here?
0:18:47 > 0:18:52- I think it does.- Why? Because it's lab rats and they're brilliant?
0:18:52 > 0:18:55Or because there'll be enough heat?
0:18:55 > 0:18:59- There'll be enough heat and the lab rats are good.- Are you sure?
0:18:59 > 0:19:03- Have you met a lab rat recently? - I've seen them. They don't talk.
0:19:03 > 0:19:05They're not allowed. But what will they say?
0:19:05 > 0:19:08They just want to do experiments. A mixed bag over here.
0:19:08 > 0:19:12- What do we think?- I don't think it will.- No, I don't think it will.
0:19:12 > 0:19:17Who over here thinks it will? A few. Do you think it will or it won't?
0:19:17 > 0:19:23I think it will. I reckon we're about split 50-50.
0:19:23 > 0:19:26Teams, don't listen to the audience on this one.
0:19:26 > 0:19:31Use your own scientific brains. Have you come up with an answer?
0:19:31 > 0:19:33Reds, have you done the same?
0:19:33 > 0:19:35Will it or won't it?
0:19:35 > 0:19:41- It will.- Reds.- It won't.- Yellows think it will, Reds think it won't.
0:19:41 > 0:19:43Let's look at the rest of the experiment.
0:19:46 > 0:19:51Here it comes, our giant solar balloon.
0:19:58 > 0:20:02It's massive but it will need a lot more air before it will fly.
0:20:06 > 0:20:08Oh, no, not the hairdryers again!
0:20:08 > 0:20:10Haven't you got anything better?
0:20:13 > 0:20:17My lab rats can barely hold on. Time for the launch.
0:20:17 > 0:20:18# ..To the sky
0:20:18 > 0:20:19# It's very high
0:20:19 > 0:20:21# I want to... #
0:20:21 > 0:20:24There it goes, up, up and...along the ground.
0:20:24 > 0:20:25# ..Fly away... #
0:20:25 > 0:20:27Come back, balloon, come back!
0:20:27 > 0:20:31# Yeah, yeah, yeah
0:20:31 > 0:20:34# I want to get away
0:20:34 > 0:20:38# I want to fly away
0:20:38 > 0:20:43# Yeah, yeah, yeah...#
0:20:43 > 0:20:47It kind of wanted to, but struggling to get enough warm air in there,
0:20:47 > 0:20:49which means it didn't work.
0:20:49 > 0:20:52Reds, the point goes to you. It's 3-2 to the Reds.
0:20:54 > 0:20:56Sorry, yellows. It wanted to.
0:20:56 > 0:20:57We could see it trying.
0:20:57 > 0:21:01Both teams, I need you to get ready for the Messy Messy Mess Test.
0:21:01 > 0:21:04You'll need those protective suits.
0:21:04 > 0:21:10Those solar balloons are great. I've got one. It's just a bin bag.
0:21:10 > 0:21:13If it's one of these fancy ones that ties off at the end.
0:21:13 > 0:21:17You could maybe tie the ends together or just tape it up.
0:21:17 > 0:21:19Leave it in the sun. Get air in it before you do it.
0:21:19 > 0:21:24Leave it in the sun and you'll have an air balloon.
0:21:24 > 0:21:27That's because the black of the bag is absorbing heat from the sun,
0:21:27 > 0:21:31that's heating the air, that air
0:21:31 > 0:21:33spaces itself inside the bag and it's then full of air
0:21:33 > 0:21:37that's lighter than the air outside and it'll float up.
0:21:37 > 0:21:41It's time for us to get on with the Messy Messy Mess Test.
0:21:45 > 0:21:51Which today is in my septic tank. You all right, teams? Good.
0:21:51 > 0:21:55Don't ask me what's in because you don't want to know what's in there.
0:21:55 > 0:21:59Just watch it because it's watching you.
0:21:59 > 0:22:02Hidden in the septic tank are a number of discs.
0:22:02 > 0:22:07Some are like this, duds, but the ones you're after are like these,
0:22:07 > 0:22:08as modelled by my lab rat.
0:22:08 > 0:22:12They feature your team colour and the names of prizes.
0:22:12 > 0:22:14Radio-controlled Mosquito,
0:22:14 > 0:22:17an MP3 player or a set of Robo-Bugs.
0:22:17 > 0:22:19Lab rat, hide those and then get out.
0:22:19 > 0:22:25Your job is to get as many of those prize discs into these baskets here.
0:22:25 > 0:22:28We've got one for the Yellows and one for the Red team.
0:22:28 > 0:22:32The winning team gets the most prize discs into their basket.
0:22:32 > 0:22:36At the end of the game, you take home all of those prizes, one each.
0:22:36 > 0:22:40The losing team has to blow their prizes up.
0:22:40 > 0:22:43You have some time to do this.
0:22:43 > 0:22:47Reds, you're ahead right now and your points have earned you
0:22:47 > 0:22:49a five-second advantage.
0:22:49 > 0:22:52When you hear the first siren, you start looking for those discs.
0:22:52 > 0:22:58Yellows, once you hear the second one, that's your cue to search.
0:22:58 > 0:22:59So you have time to get
0:22:59 > 0:23:02as many prize discs as you can into your baskets.
0:23:02 > 0:23:05And that some time starts...now!
0:23:05 > 0:23:08The Reds are first off the mark.
0:23:08 > 0:23:12It's an intimidating sight for the Yellows. How will they respond?
0:23:17 > 0:23:20The Yellows begin the hunt for the elusive prize discs.
0:23:20 > 0:23:24Everyone seems to be moving in slow motion today.
0:23:24 > 0:23:28They're unable to spot the prize discs through the brown goo.
0:23:28 > 0:23:30They must need glasses!
0:23:30 > 0:23:33The sirens have sounded. The challenge has begun.
0:23:34 > 0:23:37Would you believe it?! I forgot to warn the teams
0:23:37 > 0:23:42that every now and again more sludge makes its way into the tank.
0:23:42 > 0:23:46They've probably discovered that now but it does bring with it
0:23:46 > 0:23:47prize discs.
0:23:47 > 0:23:50Sometimes. It's a compensation.
0:23:50 > 0:23:56More goo, more prize discs, more wannabe scientists covered in muck.
0:23:56 > 0:23:59The Reds' basket looks more healthy than the Yellows',
0:23:59 > 0:24:02who seem to be losing more than just their helmets in this sea of brown.
0:24:02 > 0:24:07I don't know what it is, but it's not pretty. And the smell...ugh!
0:24:08 > 0:24:12A score for the Yellows. Have they left it too late?
0:24:12 > 0:24:14There's only a random amount of time left.
0:24:14 > 0:24:18Both teams look more like they're visiting the swimming baths
0:24:18 > 0:24:21than competing in serious scientific endeavour.
0:24:21 > 0:24:25A siren and more disgustingness for them to deal with.
0:24:25 > 0:24:28It is raining prize discs but which team will
0:24:28 > 0:24:31take best advantage of this goody-laden downpour?
0:24:36 > 0:24:38END-OF-GAME SIREN
0:24:38 > 0:24:44That is it. Your time is up. Stop looking for the prize discs.
0:24:44 > 0:24:47It's nice in there, isn't it? No, it's not!
0:24:47 > 0:24:51I have lab rats counting them up. Let's find out the scores.
0:24:51 > 0:24:54How many have the Yellow Team got? Four prize discs.
0:24:54 > 0:24:59Lab rat over here, for the Reds. An amazing eight for the Reds!
0:24:59 > 0:25:00The Reds are the winners.
0:25:00 > 0:25:04CHEERING
0:25:04 > 0:25:07Reds, you'll take home all the prizes you found on those discs.
0:25:07 > 0:25:11Ready, Nan? Each of you get
0:25:11 > 0:25:15an electromagnetic kit, a Magic Professor Kit,
0:25:15 > 0:25:20Horrible Science books, an Explosive Experiments kit,
0:25:20 > 0:25:28test-tube sea horses, Robo-Bugs, a transforming robot,
0:25:28 > 0:25:34and a remote controlled Mosquito. Well done, Reds.
0:25:34 > 0:25:39Yellows, um, slightly trickier, because this is a list of what
0:25:39 > 0:25:43you would have won, but you haven't. You would have won, each of you,
0:25:43 > 0:25:48- an electromagnetic kit...- Ahh! - Horrible Science books...- Ahh!
0:25:48 > 0:25:54- A transforming robot each...- Ahh! - And Hulk Smash Hands...- Ahh!
0:25:54 > 0:25:59Instead of winning them, though, you're gonna blow them up.
0:25:59 > 0:26:01It is now time for Bidet Goes Bang.
0:26:09 > 0:26:14This is it. Red Team, I'm trying to look sombre because Yellow Team
0:26:14 > 0:26:17are about to blow up their prizes. That's difficult
0:26:17 > 0:26:22when you're standing behind a wheelbarrow full of stuff.
0:26:22 > 0:26:24Yellows, how are you feeling?
0:26:24 > 0:26:30- Disappointed.- What went wrong? Why didn't you win the game?
0:26:30 > 0:26:34They won the hot air balloon race.
0:26:34 > 0:26:37If you'd won and taken the points, you'd have got a head start.
0:26:37 > 0:26:42It is difficult in that septic tank. Who's going to push the plunger?
0:26:42 > 0:26:46- All of us.- Share the blame.
0:26:46 > 0:26:49If you're feeling down, my exploding bidet will lift you up.
0:26:49 > 0:26:52Sometimes, through the ceiling and into the room above.
0:26:52 > 0:26:56Your prizes have been placed in there.
0:26:56 > 0:27:00Let's do the exploding. Step forwards and lift the plunger.
0:27:00 > 0:27:07Let's count them down. Five, four, three, two, one.
0:27:11 > 0:27:12There you go, Yellows.
0:27:12 > 0:27:14When your mum asks what you learnt, say
0:27:14 > 0:27:17Richard Hammond taught you that hot air rises.
0:27:17 > 0:27:20Probably best not to tell her that we learnt this by
0:27:20 > 0:27:23mucking about with hot air balloons and then blowing bin bags.
0:27:23 > 0:27:24See you next time.
0:27:24 > 0:27:28CHEERING AND APPLAUSE
0:27:38 > 0:27:42Blast Lab was recorded before a live studio audience.
0:27:42 > 0:27:44No lab rat was harmed during the filming.
0:27:44 > 0:27:50One might have been, but I won't be able to tell until he comes round.
0:27:52 > 0:27:54Subtitles by Red Bee Media Ltd
0:27:54 > 0:27:57E-mail subtitling@bbc.co.uk