What not to grab if you jump out of a building. Not for the faint hearted โ experiments on roller coasters. Getting down to the big questions down at the lab. What is Britainโs stretchiest food. We perform an eggsperiment on Brainiac Joe. How permanent is a permanent marker. What is the quickest way to send a text. Going on a picnic โ how to tell itโs not going to rain. Does eating floaty foods produce floaty poo. Can the carbon dioxide wheelchair win in a race. Cutting up onions โ what should you do if you donโt want to blub in the kitchen. Lad v Lass discovers which is better at remembering.