I like the logs, or maybe the one where they are on the moving platform, and have to jump over stuff or fall in the water. One of my favorite episodes was where they had the addicts vs. the donors. That one was hella funny.
another great part of the show is in the beginning, when the "captain" asks all those people some random question, and they all raise their hands, and he tells them they're all wrong ... or something like that. yeah. hehe.