0:00:09 > 0:00:12Super Human Challenge!
0:00:19 > 0:00:24This car was designed to travel at an amazing 150 mph.
0:00:24 > 0:00:28That's like doing the 200 metres in about half a second.
0:00:28 > 0:00:31But I've heard of a car that's been designed to travel
0:00:31 > 0:00:33nearly seven times faster than that.
0:00:35 > 0:00:37A staggering 1,000 mph!
0:00:40 > 0:00:42That's faster than a jumbo jet.
0:00:43 > 0:00:45It's faster than the speed of sound.
0:00:46 > 0:00:49Faster than a speeding bullet.
0:00:49 > 0:00:51The fastest car in the world!
0:00:54 > 0:00:55To drive a car like that,
0:00:55 > 0:00:58you'd need the powers of a superhero.
0:01:00 > 0:01:02A superhero like Superman,
0:01:02 > 0:01:08who travels at unbelievable speed and defies gravity to battle evil.
0:01:08 > 0:01:12But I have heard of a real man who can travel super-fast!
0:01:12 > 0:01:15A man who can withstand the forces of staggering speed!
0:01:15 > 0:01:19A real-life man that can defy gravity!
0:01:21 > 0:01:24At 18 years old, Andy Green joined the Royal Air Force,
0:01:24 > 0:01:27training as a fighter pilot. It was here that he discovered
0:01:27 > 0:01:30his amazing abilities at supersonic speeds.
0:01:30 > 0:01:33He's trained his body and mind to survive the powerful forces
0:01:33 > 0:01:36that are produced by the world's fastest machines!
0:01:36 > 0:01:38Astonishing scientists around the world,
0:01:38 > 0:01:44he is the only human being to break the speed of sound in a car.
0:01:44 > 0:01:45And this is him! Andy Green.
0:01:45 > 0:01:48- Andy, I'm thrilled to meet you. - Tim, great to meet you.
0:01:48 > 0:01:51And this is a model of the Bloodhound supersonic car?
0:01:51 > 0:01:55Exactly right. This is going to be the world's fastest land vehicle.
0:01:55 > 0:01:58So driving at that kind of speed must require super skills?
0:01:58 > 0:02:01I'm lucky. I've got a background as a Royal Air Force fighter pilot,
0:02:01 > 0:02:03so I'm used to controlling things at high speed,
0:02:03 > 0:02:05travelling at very high speeds
0:02:05 > 0:02:07and, of course, coping with very high G-forces.
0:02:07 > 0:02:10So it's that kind of thing when you're on, say, a roller coaster
0:02:10 > 0:02:12and your body goes "whoa" against the chair. That's G-force?
0:02:12 > 0:02:14- Exactly.- OK. - When you go round the dips,
0:02:14 > 0:02:17and you're squashed into the seat, that's positive G,
0:02:17 > 0:02:20and, as you go up over the top and you float in the seat,
0:02:20 > 0:02:21that's zero into negative G.
0:02:21 > 0:02:25So would you mind if we undertook three tests, your body against mine,
0:02:25 > 0:02:30and we'll test them both and see if your body does something different?
0:02:30 > 0:02:32- Up for that?- Of course. I'm a fighter pilot in the RAF, I'm used
0:02:32 > 0:02:35- to be being tested, so absolutely, let's do it.- Let's have a go.
0:02:36 > 0:02:40This is Dr Megan John. She's an expedition doctor
0:02:40 > 0:02:43and has kept people alive in some of the most dangerous environments.
0:02:45 > 0:02:47She's devised three super-tests
0:02:47 > 0:02:50to discover how Tim and Andy's bodies react differently.
0:02:56 > 0:03:00Day One and Dr Megan's first test is a real head-spinner.
0:03:00 > 0:03:03This might not look like much, but inside here is a piece of equipment
0:03:03 > 0:03:06that will let me test how your body reacts to G-force.
0:03:07 > 0:03:12In Super-Test One, Dr Megan will use this - a centrifuge.
0:03:12 > 0:03:15Tim and Andy will be strapped into one of these hanging pods.
0:03:15 > 0:03:17As the centrifuge starts to spin round and round,
0:03:17 > 0:03:20the pods will swing out towards the wall.
0:03:20 > 0:03:25The faster the centrifuge spins, the more G-forces it makes. Dr Megan
0:03:25 > 0:03:29will see how the different levels of G-force affects their bodies.
0:03:29 > 0:03:33If you imagine like a washing machine on a fast spin cycle...
0:03:33 > 0:03:37- Yeah?- ..with all the clothes and the water being squished to either side,
0:03:37 > 0:03:41- that's what this will be like. - Have you been on this thing before?
0:03:41 > 0:03:43This is where all RAF fighter pilots come.
0:03:43 > 0:03:47We actually come here to train in experiencing G for the first time.
0:03:47 > 0:03:50- Wow, so they train fighter jet pilots here?- Exactly right!
0:03:50 > 0:03:53To make sure that, when we actually fly the aeroplanes, we know
0:03:53 > 0:03:57how to counter the G-force pulling the blood away from your head.
0:03:57 > 0:03:59Cos the last thing you need when you're flying a aeroplane
0:03:59 > 0:04:02is to start to lose your vision or indeed to start to lose
0:04:02 > 0:04:04the ability to think and react and co-ordinate.
0:04:04 > 0:04:07Everyone has a different tolerance to G-forces.
0:04:07 > 0:04:10But when 2 Gs are being applied, you'll feel twice as heavy
0:04:10 > 0:04:14and less blood gets to your head, making you feel light-headed.
0:04:14 > 0:04:17At 3 Gs, it feels like you're being crushed.
0:04:17 > 0:04:20Less blood gets to your eyes, making it harder to see.
0:04:20 > 0:04:24Between 4 and 6 Gs, you are in danger of passing out.
0:04:24 > 0:04:26Too much G-force over a long period of time
0:04:26 > 0:04:29can stop your blood flowing and you could die.
0:04:32 > 0:04:35This pod is kitted out with a blood pressure and heart rate monitor.
0:04:35 > 0:04:38There are two red lights for Andy and Tim to watch.
0:04:38 > 0:04:40The minute these lights begin to disappear,
0:04:40 > 0:04:41they must press the stop button
0:04:41 > 0:04:44as not enough blood is getting to their brain.
0:04:44 > 0:04:47Dr Megan will be monitoring everything from the control room
0:04:47 > 0:04:50and will stop the test if things get too dangerous.
0:04:52 > 0:04:55So how will Tim cope in the centrifuge?
0:04:55 > 0:04:57Will he make it to 6 G?
0:04:57 > 0:05:01This does feel like the control centre of something important.
0:05:01 > 0:05:04And will Andy reveal super G-force powers
0:05:04 > 0:05:09and keep the blood in his brain in this awesome test of the centrifuge?
0:05:09 > 0:05:11OK.
0:05:12 > 0:05:13Happy.
0:05:13 > 0:05:15It's amazing, it starts eerily slowly
0:05:15 > 0:05:17and then, suddenly, it kicks off.
0:05:17 > 0:05:22The movement of the centrifuge is tipping the pod.
0:05:22 > 0:05:23And away we go.
0:05:23 > 0:05:25MAN: 'That's 2 G now.'
0:05:25 > 0:05:28The centrifuge has started at 2 Gs.
0:05:28 > 0:05:32Andy and Tim's bodies should be feeling twice as heavy as normal.
0:05:32 > 0:05:33HE GASPS
0:05:33 > 0:05:35Wow!
0:05:35 > 0:05:39So Tim's having fun at the moment, he's at just over 2 G-force.
0:05:39 > 0:05:41Heart rate's really comfortable.
0:05:41 > 0:05:43Tim's heart rate might be comfortable,
0:05:43 > 0:05:47but as the G-force increases, he's beginning to feel the effects
0:05:47 > 0:05:48on other parts of his body.
0:05:48 > 0:05:51It feels like there's something pushing down on my shoulders
0:05:51 > 0:05:53and it's trying to push me into the floor.
0:05:53 > 0:05:58Under the same amount of G-force, Andy seems perfectly calm.
0:05:58 > 0:06:02When we hit 2 G of force, Andy's heart rate was still going at only
0:06:02 > 0:06:0660-70 beats a minute. Still pretty much the same as it was at rest.
0:06:06 > 0:06:08MAN: 'And you're now at 3 G.'
0:06:08 > 0:06:12Sort of like there's a hippopotamus sitting on my chest or something.
0:06:12 > 0:06:13Trying to stay relaxed.
0:06:13 > 0:06:16So he's saying that he feels a lot of weight on his chest.
0:06:16 > 0:06:21That's because, at 3 G, you weigh three times what you normally would,
0:06:21 > 0:06:23so it literally feels like all the air is being
0:06:23 > 0:06:27- squashed out of his lungs and pushed backwards.- 'Wow!'- And in response,
0:06:27 > 0:06:32- his heart rate's gone up by about 30 extra a minute.- 'That's 4 G now.'
0:06:32 > 0:06:33Tim's heart is working harder
0:06:33 > 0:06:36to keep the blood moving around his body.
0:06:36 > 0:06:40Blood moves around your body in tubes called blood vessels.
0:06:40 > 0:06:44Blood vessels stretch open as your heart pumps blood through them.
0:06:44 > 0:06:49The force of blood going through them is called blood pressure.
0:06:49 > 0:06:52Usually, blood moves evenly from your head to your toes,
0:06:52 > 0:06:57but at 3 Gs, the force will push the blood towards your feet.
0:06:57 > 0:06:59With the blood being pushed downwards,
0:06:59 > 0:07:01it's harder for it to be pumped upwards.
0:07:01 > 0:07:03And so there's less blood going to your head
0:07:03 > 0:07:05and your blood pressure is lower.
0:07:07 > 0:07:10Andy and Tim are now experiencing 4 G.
0:07:10 > 0:07:13That's huge. That is a big amount of G pushing down
0:07:13 > 0:07:15and I'm going to try and lift my arms up.
0:07:15 > 0:07:17Wow! They feel heavy, really heavy!
0:07:17 > 0:07:20Most people would be struggling to stay conscious
0:07:20 > 0:07:24at this level of G-force. It's amazing that Tim is still going.
0:07:24 > 0:07:26I have the red lights.
0:07:26 > 0:07:28But even more amazingly,
0:07:28 > 0:07:32our G-force man Andy is still feeling little effect.
0:07:32 > 0:07:34At a comfortable 4 G, so something
0:07:34 > 0:07:37we really are trained to cope with reasonably consistently.
0:07:37 > 0:07:42So Andy's heart rate's still going pretty much the same as resting.
0:07:42 > 0:07:46It is incredible! At 4 G, Andy's heart rate is the same
0:07:46 > 0:07:49as it would be if he was sitting at home having a cup of tea!
0:07:50 > 0:07:55OK, we're at 5 G now and I can feel it's affecting my voice,
0:07:55 > 0:07:58because my jaw feels like it's dropping out.
0:07:58 > 0:08:03Andy's jaw seem unaffected. He's having no problem speaking.
0:08:03 > 0:08:055 G, now starting to work a little bit harder
0:08:05 > 0:08:09in terms of feeling the G, supporting my head.
0:08:09 > 0:08:14Finally, at 5 G, Andy is starting to feel some effects of the G-force,
0:08:14 > 0:08:16but not as much as Tim!
0:08:16 > 0:08:20The force is pushing the skin on his face right back.
0:08:20 > 0:08:25Dr Megan is worried he could be close to losing his vision.
0:08:25 > 0:08:26It's really important you let me know
0:08:26 > 0:08:28if those red dots start to disappear.
0:08:28 > 0:08:30I still have the red lights.
0:08:31 > 0:08:34Your eyes have light-detecting cells at the back of them
0:08:34 > 0:08:37that tell your brain what you can see.
0:08:37 > 0:08:41These cells need oxygen from your blood to work.
0:08:41 > 0:08:44As the G-force pushes blood down,
0:08:44 > 0:08:46your eyes get less blood. First of all,
0:08:46 > 0:08:49it's only the cells at the edges that stop working
0:08:49 > 0:08:52and it seems like you're looking down a tunnel.
0:08:52 > 0:08:54Eventually, no blood will get to your eyes
0:08:54 > 0:08:57and you won't be able to see anything.
0:08:57 > 0:08:59Luckily, when the G-force stops,
0:08:59 > 0:09:02blood returns to your eyes and you'll be able to see again.
0:09:03 > 0:09:06The centrifuge is now at 6 G.
0:09:06 > 0:09:09Starting to get some very slight symptoms around my peripheral vision
0:09:09 > 0:09:12and the external lights are very odd.
0:09:12 > 0:09:14So we know, if the blood pressure at the level of his eye
0:09:14 > 0:09:18falls below about 20, that's when your vision starts to go.
0:09:18 > 0:09:20That's when you're about to collapse and faint.
0:09:20 > 0:09:22This is an incredible amount of force!
0:09:22 > 0:09:276 G is a massive amount of G-force for the average body.
0:09:27 > 0:09:31Tim and Andy's blood pressure is now reaching dangerously low levels
0:09:31 > 0:09:33and they're at a very high risk of blacking out.
0:09:33 > 0:09:36It's time to stop the centrifuge.
0:09:36 > 0:09:38And there we are back to level.
0:09:38 > 0:09:41Wow, it's amazing, when they take the force off you,
0:09:41 > 0:09:44you feel like you can fly.
0:09:44 > 0:09:47So with the first Super Test over, Tim and Andy both got
0:09:47 > 0:09:50to an incredible 6 G without losing the lights.
0:09:50 > 0:09:53Tim's heart rate more than doubled.
0:09:53 > 0:09:56But how did superman Andy do?
0:09:56 > 0:09:58Andy's heart rate stayed pretty stable.
0:09:58 > 0:10:01It's very surprising, it's not what we'd have expected to see
0:10:01 > 0:10:03and it's certainly not what we've seen in Tim.
0:10:03 > 0:10:05How does he do it?
0:10:06 > 0:10:10Andy's heart is much stronger than a normal person's heart.
0:10:10 > 0:10:14Your heart is a muscle and, when it squeezes tightly, it forces blood
0:10:14 > 0:10:18into your arteries which carry the blood round your body.
0:10:18 > 0:10:19But even when the G-forces are
0:10:19 > 0:10:22trying to push Andy's blood down to his feet,
0:10:22 > 0:10:25his heart is strong enough to fight the G-forces
0:10:25 > 0:10:28and pump blood all the way up to his head.
0:10:31 > 0:10:33Experiencing G-forces in the centrifuge
0:10:33 > 0:10:36was pretty hard on my body. In some situations,
0:10:36 > 0:10:40people change their position to help reduce the G-forces on them.
0:10:40 > 0:10:44When taking off from the ground, astronauts withstand around 3 Gs.
0:10:44 > 0:10:49They soar into space at 27,000 kilometres per hour.
0:10:49 > 0:10:53To reduce the effects of G-forces, the astronauts lie on their backs,
0:10:53 > 0:10:57changing the direction of the forces on their bodies.
0:10:57 > 0:10:59Lying down makes it easier for their hearts
0:10:59 > 0:11:02to pump blood to their brains, so they don't pass out.
0:11:02 > 0:11:04When the astronauts reach space,
0:11:04 > 0:11:07they stop accelerating and the G-forces stop.
0:11:12 > 0:11:15Day Two, Super-Test Two.
0:11:16 > 0:11:20I've brought you to Silverstone, the home of the British Grand Prix,
0:11:20 > 0:11:23cos the two of you will be driven around the track at top speeds.
0:11:23 > 0:11:25Going so fast can generate G-force on your body,
0:11:25 > 0:11:28but that'll be increased still further
0:11:28 > 0:11:30when the cars brake or take sudden turns.
0:11:30 > 0:11:32That can be really disorientating,
0:11:32 > 0:11:36and disorientation is what I'm going to be measuring in this test today.
0:11:38 > 0:11:42One lap of this race course is almost six kilometres.
0:11:42 > 0:11:44The track's 18 sharp corners and bends
0:11:44 > 0:11:46will really push Tim and Andy's bodies
0:11:46 > 0:11:49as they are thrown about when the car speeds around the track.
0:11:51 > 0:11:53And we're doing it in which cars?
0:11:55 > 0:11:57These cars might look small,
0:11:57 > 0:12:02but they're built to travel up to an incredible 240 kilometres per hour!
0:12:02 > 0:12:05Dr Megan's team have fitted each car with cameras
0:12:05 > 0:12:08that will record how Tim and Andy react
0:12:08 > 0:12:10as they are whizzed around the race track.
0:12:10 > 0:12:13This special camera will show us what speed each car is travelling
0:12:13 > 0:12:17and the effects of the G-force at different stages of the test.
0:12:19 > 0:12:21And just one more thing...
0:12:21 > 0:12:24I'm going to be getting the two of you to do this blindfolded.
0:12:24 > 0:12:26There's always a catch!
0:12:26 > 0:12:30Well, if we take away your visual cues, your body and your brain
0:12:30 > 0:12:33find it even harder to work out what's going on.
0:12:33 > 0:12:37When you get scared or emotional, your body sweats more
0:12:37 > 0:12:41and I've got a special piece of kit called a GSR sensor and this sensor
0:12:41 > 0:12:45picks that up by an increasing of electrical current across the skin.
0:12:45 > 0:12:47- Are you on for this?- Always.
0:12:51 > 0:12:53This is quite a tight fit, isn't it?
0:12:53 > 0:12:55I can't see anything.
0:12:55 > 0:13:00Your body has a balance system that tells your brain when you're moving.
0:13:00 > 0:13:05But if you can't see where you're going, your brain gets confused.
0:13:05 > 0:13:08At first, you'll start to feel dizzy and sick.
0:13:08 > 0:13:12Next, your body will get stressed, your heart will beat faster,
0:13:12 > 0:13:15your temperature will rise and you'll start to sweat.
0:13:15 > 0:13:17Eventually, you'll be so disorientated,
0:13:17 > 0:13:19you might throw up.
0:13:20 > 0:13:23Ready? And go!
0:13:23 > 0:13:26Andy will be leading the way in the orange car.
0:13:26 > 0:13:28- HE LAUGHS - And straight way,
0:13:28 > 0:13:30he seems to be enjoying himself.
0:13:30 > 0:13:33But Tim, in the white car, seems a little more cautious.
0:13:44 > 0:13:47Tim is already feeling the force in his body.
0:13:56 > 0:13:58Tim may be getting the corners right,
0:13:58 > 0:14:01but Andy seems to be focusing on what the car is doing.
0:14:07 > 0:14:10At the bottom centre of the screen is the G-force dial.
0:14:10 > 0:14:12It looks like a target.
0:14:12 > 0:14:14Look how much they're being banged about in these cars!
0:14:14 > 0:14:17The dot in the middle is like their internal organs.
0:14:24 > 0:14:27The sudden change of G-force is really dangerous
0:14:27 > 0:14:29for your heart, lungs, liver and kidneys,
0:14:29 > 0:14:32because it makes them move about in your body.
0:14:32 > 0:14:36And if this happens, they can get bruised and damaged.
0:14:36 > 0:14:38When your organs are being moved about by G-forces,
0:14:38 > 0:14:43your tummy muscles tighten around them to stop them moving so much,
0:14:43 > 0:14:44but you can't do this forever
0:14:44 > 0:14:47and, eventually, your muscles will start to get tired.
0:14:49 > 0:14:51Back in the cars, and Andy seems to know
0:14:51 > 0:14:53exactly what part of the track he's on.
0:14:57 > 0:15:01It's like he's made a mental map of the course after just one lap.
0:15:01 > 0:15:06This means he can prepare his body for the G-force before each corner.
0:15:09 > 0:15:11Tim doesn't have a clue where he is!
0:15:14 > 0:15:17Fantastic, we can already hear the cars coming round.
0:15:17 > 0:15:19Amazingly, Andy is still calm,
0:15:19 > 0:15:21and knows exactly where he is on the track!
0:15:42 > 0:15:45All this movement can make you feel car sick.
0:15:45 > 0:15:49Now this is because your brain takes information from your eyes
0:15:49 > 0:15:52and your inner ears to work out if you're moving or not.
0:15:52 > 0:15:54If you're in a car and you're reading a book,
0:15:54 > 0:15:58sensors in your ears tell your brain that you are moving,
0:15:58 > 0:16:00but your eyes get it wrong and tell your brain
0:16:00 > 0:16:03that you're sitting still, because the book isn't moving.
0:16:03 > 0:16:07These different signals completely confuse your brain.
0:16:07 > 0:16:08Now, some scientists believe
0:16:08 > 0:16:11that your brain thinks you've been poisoned.
0:16:11 > 0:16:14So, in order to get rid of the poison, you need to be sick.
0:16:14 > 0:16:16This is called motion sickness.
0:16:19 > 0:16:22Going at this sort of pace around a track with 18 bends
0:16:22 > 0:16:24would be disorientating enough on its own,
0:16:24 > 0:16:25but having put them in blindfolds,
0:16:25 > 0:16:27the brain's got no idea what's going on.
0:16:29 > 0:16:32Andy's behaving as though he's on a drive to the supermarket.
0:16:32 > 0:16:37But Tim looks like he's had enough. It's time to bring in the cars.
0:16:41 > 0:16:43It's amazing! Andy's mental map of the course
0:16:43 > 0:16:46means he knows they're pulling into the pits.
0:16:46 > 0:16:50But Tim's taken a little bit longer to work out what's going on.
0:17:04 > 0:17:06With Super-Test Two over,
0:17:06 > 0:17:10Dr Megan is keen to find out the results from the stress sensors.
0:17:10 > 0:17:13- Thank you very much. - Thank you.- Thank you.
0:17:15 > 0:17:18We were looking at the sweatiness to give us an indication
0:17:18 > 0:17:21of how disorientated and stressed your bodies were.
0:17:21 > 0:17:24For the first lap, you were both getting quite sweaty,
0:17:24 > 0:17:27but then Andy managed in his mind
0:17:27 > 0:17:30to work out what was happening and where he was going.
0:17:30 > 0:17:32And his graph becomes a flat line.
0:17:32 > 0:17:34He was as cool as a cucumber throughout.
0:17:34 > 0:17:37You, on the other hand, Tim, your graph's all over the place
0:17:37 > 0:17:40showing me you were getting more and more disorientated
0:17:40 > 0:17:41and more and more sweaty.
0:17:43 > 0:17:47The G-forces our bodies experienced during Super-Test Two are nothing
0:17:47 > 0:17:51compared to the immense G-forces created by a high-speed car crash.
0:17:51 > 0:17:55In 1977, racing driver David Purley was competing
0:17:55 > 0:17:59in the Silverstone Grand Prix. But while driving at top speeds,
0:17:59 > 0:18:02he lost control of his car and crashed into a wall.
0:18:02 > 0:18:07In the crash, he decelerated from 108 mph to zero
0:18:07 > 0:18:11in the space of only 66 cm! That's not even the length of my arm!
0:18:11 > 0:18:15This produced one of the highest G-forces ever to be survived -
0:18:15 > 0:18:19a whopping 179.8 Gs!
0:18:19 > 0:18:21David broke his legs, pelvis and ribs,
0:18:21 > 0:18:25but amazingly, he was back in racing cars only two years later.
0:18:36 > 0:18:38For our third and final test, I've brought you to the airfield
0:18:38 > 0:18:40- where Andy keeps his stunt plane. - Oh, good(!)
0:18:40 > 0:18:44In order to train his body and get used to his G-force techniques,
0:18:44 > 0:18:46he takes his plane up on a regular basis
0:18:46 > 0:18:49and performs some pretty incredible manoeuvres.
0:18:49 > 0:18:52Just one of the tricks Andy does in this
0:18:52 > 0:18:54can take your body up to 8 Gs of force.
0:18:54 > 0:18:58That can significantly affect your blood pressure and brain function.
0:18:58 > 0:19:01- You up for being Andy's passenger, Tim?- Yes.
0:19:01 > 0:19:04Well, Andy's going to do three of his stunts for us today.
0:19:04 > 0:19:07For the first one, he's going to fly up to about 2,000 feet.
0:19:07 > 0:19:11- That's about 610 metres.- Indeed. - And he's going to do a barrel roll.
0:19:11 > 0:19:14Next up, a loop the loop, and, finally -
0:19:14 > 0:19:16and this one sounds like a terrible stomach churner -
0:19:16 > 0:19:20he's going to do a corkscrew spiral nose dive.
0:19:20 > 0:19:23Sounds terrible! So we're going down towards the earth in the plane,
0:19:23 > 0:19:25- and we're going like that? - Absolutely.
0:19:25 > 0:19:28And we'll gradually tighten that spiral dive,
0:19:28 > 0:19:30so the G gets higher and higher and higher,
0:19:30 > 0:19:32to let you experience the rising level of G
0:19:32 > 0:19:33until either you say you've had enough
0:19:33 > 0:19:37or I'm the only conscious one in the aeroplane and then we'll pull out.
0:19:37 > 0:19:39- Great(!)- And I'll be watching you very closely.
0:19:39 > 0:19:41If that starts to happen to you,
0:19:41 > 0:19:43I'll stop straight away and you'll recover.
0:19:43 > 0:19:45The downside is, you will feel rubbish for the rest of the day.
0:19:45 > 0:19:47- Right.- Throughout the test,
0:19:47 > 0:19:50I'll monitor your heart rate and blood pressure
0:19:50 > 0:19:53and I'll be asking questions to check on your brain function.
0:19:53 > 0:19:56And, don't worry, just to give you a chance, I'll make 'em pretty easy.
0:19:56 > 0:19:58So now it's a quiz night as well as an aerobatics display?
0:19:58 > 0:20:00That's not making it easier!
0:20:00 > 0:20:02And possibly giving your lunch a second appearance.
0:20:04 > 0:20:08The team have set up four cameras inside the cockpit
0:20:08 > 0:20:10to let us see exactly what Tim is about to go through.
0:20:12 > 0:20:15But one camera on the wing has a story to tell.
0:20:16 > 0:20:21OK, so, er, just to help us, it's now slightly raining.
0:20:21 > 0:20:24It was really good weather before and now we've got a bit of rain.
0:20:24 > 0:20:25Is that going to affect anything?
0:20:25 > 0:20:28Well, fortunately, I'm quite well trained in this,
0:20:28 > 0:20:29you and I can be very brave,
0:20:29 > 0:20:31- and we'll go flying in the rain anyway.- OK!
0:20:33 > 0:20:35Oh...OK.
0:20:35 > 0:20:39It's important that Tim is strapped in nice and tight.
0:20:39 > 0:20:42- OK.- OK, comfy?- No!- Good.
0:20:42 > 0:20:45So we've got the sick bags both sides just in case you need them.
0:20:47 > 0:20:48Don't worry, you'll be fine.
0:20:51 > 0:20:55Now that Tim's happy he's not going to fall out mid-flight,
0:20:55 > 0:20:56it's time to go.
0:21:19 > 0:21:23Andy eases Tim into the flight with one or two sudden turns.
0:21:34 > 0:21:38Tim may only be pulling 4 Gs, but it does look a lot worse.
0:21:38 > 0:21:40This is incredible, what they're doing up there.
0:21:40 > 0:21:44The pressure on your body is making me feel a bit sick
0:21:44 > 0:21:45just even thinking about it.
0:21:51 > 0:21:56These barrel rolls are upping the G-force on Tim and Andy to 5 Gs.
0:21:59 > 0:22:00So when you spin around,
0:22:00 > 0:22:04we apply G-forces both vertically and horizontally through the body.
0:22:04 > 0:22:07All your organs get shaken about as if they were in like a tumble drier.
0:22:07 > 0:22:10That can make you feel really, really sick.
0:22:12 > 0:22:15Just before Andy and Tim's flight took off,
0:22:15 > 0:22:17I saw someone else come down from a similar flight.
0:22:17 > 0:22:20He was sick all over the place! That's a really typical
0:22:20 > 0:22:23average response to this type of pressure on your body.
0:22:23 > 0:22:26It's amazing that neither of the two of them have done that.
0:22:27 > 0:22:29As Andy goes into a loop the loop,
0:22:29 > 0:22:32it seems Tim isn't as scared as we expected.
0:22:37 > 0:22:40When Tim first went up, he looked really frightened.
0:22:40 > 0:22:42Now he looks like he's having a really good, fun time.
0:22:42 > 0:22:45That's the adrenalin surge that happens when you're exposed
0:22:45 > 0:22:48to something scary, which can give you a bit of excitement.
0:22:56 > 0:22:59Flipping over, it must be making him feel really sick!
0:22:59 > 0:23:02Tim? Tim, how are you feeling?
0:23:08 > 0:23:11OK, but, Tim, how are you physically feeling?
0:23:21 > 0:23:22Wow!
0:23:22 > 0:23:25So, Tim, that's because of all the G-force,
0:23:25 > 0:23:27all of these manoeuvres that Andy's plane's doing.
0:23:27 > 0:23:29Do you think you can cope with it?
0:23:43 > 0:23:44Wow!
0:23:49 > 0:23:51Tim, I want to check how your brain is managing
0:23:51 > 0:23:54with all these G-forces going through you,
0:23:54 > 0:23:57- so I'm going to ask you some questions, is that OK?- OK.
0:23:57 > 0:24:033 + 2 + 2 - 4.
0:24:07 > 0:24:09Well done, that's correct.
0:24:09 > 0:24:12We're going to make it a little bit harder now, Tim.
0:24:12 > 0:24:175 + 2 + 2 - 4.
0:24:20 > 0:24:255 + 2 + 2 - 4.
0:24:26 > 0:24:29Tim seems to be struggling with this one.
0:24:33 > 0:24:36Well done, Tim. One more for you, OK?
0:24:36 > 0:24:416 + 3 - 7 + 4.
0:24:45 > 0:24:46Good try, Tim.
0:24:46 > 0:24:50He got that quite wrong. The answer's six and Tim said three.
0:24:51 > 0:24:53It seems that the forces from this flight
0:24:53 > 0:24:56are making it harder for Tim to think straight.
0:25:29 > 0:25:32Andy, if it's OK, I'd like to ask you some questions too?
0:25:34 > 0:25:38OK, 5 + 4 - 7 + 4.
0:25:40 > 0:25:42OK, well done, try another one.
0:25:42 > 0:25:454 + 4 - 3 - 2?
0:25:47 > 0:25:51He's so quick, I barely caught the answer. ..But yes, well done, Andy.
0:25:53 > 0:25:57Andy's training has certainly paid off. He's spot on.
0:26:36 > 0:26:39After a few more stomach-churning rolls and turns...
0:26:39 > 0:26:41Aa-a-argh!
0:26:41 > 0:26:43..it's time to come back to base.
0:27:04 > 0:27:07I came out here looking for a superhuman!
0:27:07 > 0:27:08I have definitely found one!
0:27:10 > 0:27:12A real live Superman!
0:27:12 > 0:27:16A man who can defy the forces of gravity.
0:27:16 > 0:27:20Andy Green, you are Super Human!
0:27:30 > 0:27:34Subtitles by Red Bee Media Ltd