Overview: Which bomb produces the biggest splash. What happens when you mix up gardening with high explosives. How much weight can resident Brainiac Boffin Jon Tickle lose in just 4 hours. Through plans on the internet, you can build your own personal hovercraft. ESP is put to the test with a pair of twins. Which roll of tape in your kitchen drawer is the stickiest. Can a water cooler get down for speeding. Can we stretch our shortest brainiac enough to get him on a rollercoaster. Does high performance equipment result in a high performance performance. The British Army take on the safe. And Fat v Thin concludes.