Andy takes on the bounding brilliance of the grasshopper as he is challenged to match its ability to leap ten times its body length. He finds out that the secret to their gravity-defying leap lies in the elastic muscles in their knees being able to store potential energy. Armed with this knowledge, Andy heads off to try out parkour, uses jumping gadgets and takes a tumble on the trampoline with Olympic gymnast Kat Driscoll. But in the end, it's a high-altitude science lesson that gives Andy his best chance of matching the mighty grasshopper.