Rocket sled

The rocket sled is a high speed sled connected to rails that allow it to glide easily on the track.they have a rocket in the back used to propel the sled forward.The sleds were used by the United States of America in the Cold War to test ejection seats and other equipment for aircrafts.

Dovchenko vs Indiana
in 1957 a rocket sled was stored underneath Hangar 51 where Indiana Jones and Antonin Dovchenko had a fight in the control room.When the sled was set off by Dovchenko Indy and the colonel were on a high speed ride on the rocket sled track.The speeds were so high they caused Dovchenko to become unconscious.

appearances
Indiana Jones and the Kingdom of the Crystal Skull(first appearance)