The Trampo-mean is an obstacle created by John Henson that stepped onto the scene in the third season (episode 7) as the first obstacle of the Qualifier.
It consists of a trampoline wrapped around two long beams that are pushed and pulled, stretching and compressing the trampoline. On either side of the trampoline are a set of blocks from the Topple Towers.
Henson was then ashamed of it, because it was a pathetically easy obstacle, and many people were able to cross it with ease (though some of them failed the dismount). John Anderson hated this obstacle.
It was replaced by the Smack Wall Sweeper on the next episode. The components of the Trampo-mean were later used for the Unbalanced Beams.