Science of Stupid: Wissenschaft der Missgeschicke

Darren Eastall moves the bike wheels to prepare to land after the jump.

When climbing trees, the closer to the trunk, the thicker and stronger the branches are. So when jumping onto a tree, you should time your jump to reach the branch at the peak of his parabolic trajectory, when he?s moving most slowly. ?(credit: National Geographic Channels)

Chima Akenzua demonstrating how crutches can act as an inverted pendulum. (photo credit: National Geographic/Miles Harwood)

The tug of war team lean far back to try and put as much force into the pull as possible.

ESSEX, U.K. - The high jumper demonstrates how to Frosby Flop. She arches her back and gets her center of gravity high enough to clear the bar. 

(photo credit: National Geographic Channels/Nick Marwick)