If you thought the Bullet train was the fastest thing on rails, you would be wrong - more than 6000 miles per hour wrong. Rocket sled test tracks were originally designed for the V2 in WWII and can reach up to 6400 mph.They were made famous in the 50s when Lt. Col John Paul volunteered himself to test a 200mph track designed for crash test dummies, called the Gee Whiz. The test was intended to show the effects of deceleration in a plane crash, where it was assumed that nobody could survive more than 18G. Strapp survived an unbelievable 35G.More recently a rocket sled was featured in Indiana Jones and the Kingdom of the Crystal Skull.However, the lasting legacy of the Gee Whiz test is Murphy's Law, coined after a real engineer called Murphy who worked briefly at Edwards Air Force Base on the test track.