Dec 4: Diabolo advent calendar

Day 4: The Whip, love this trick. It sounds amazing and attracts a lot of attention. This is great but also bad when you miss the catch. Its also a real problem as there is almost no way to recover. See this bonus out-take footage of what happens when you get it wrong.

Author: Ianforrester

Senior firestarter at BBC R&D, emergent technology expert and serial social geek event organiser.