The Secrets of Everything

Bulletproof Vests (1x4)

Data de estreia: Mar 11, 2012

In the episode Greg finds out how he could become the fastest man on the planet, whether a person can survive being buried alive and why a boomerang comes back to its thrower. He also explores the science behind bulletproof vests, and discovers if water drains anticlockwise out of a sink in Australia.