Will Ferrell

Will Ferrell teamed up with adventurer Bear Grylls for an episode of "Born Survivor." But it wasn't Bear who had to look after Will. Will explains, ""There was a moment when we were going down the side of an ice cliff and Bear slipped and I was holding the rope. I literally had to sit there for 40 minutes while we worked out how to get him back up. That was pretty hard and cold!" [The List]