Going with the speed of light, or close to that

Looking for an alternative to the egg sled, Garth came across skeleton. He was allowed to lie on a sled for a while to feel what that is like. At least thats what he thought. But as soon as he lay down, the gate opened and Garth sped off the track at a fast pace, setting an unbeatable time! Unfortunately, the required registration was missing and his record time does not count for the medals...