WARNING: By tuning into this show you will witness a whole host of potentially dangerous and seriously stupid stunts performed by some dedicated daredevils. Please resist the temptation to try this at home. We explain the science behind what went wrong, whether it's down to a lack of consideration for the principles of velocity, rotation, friction (ouch!) or kinetic energy, one thing is for sure, you can't beat science!
National Geographic: January 2017