Someone at the Discovery Channel deserves a raise.

Because tonight, on a very special Man Vs. Wild, Will Ferrell guest stars.

Watch Will forage for shelter, rappel down a frozen waterfall, scream like a 9-year-old girl, and maybe even eat a little yellow snow. (Anything to promote an upcoming movie.)

Watch as Bear Grylls schools the curly-haired comedic genius in the finer points of survival, like foraging for food, building shelter, and if we're lucky, drinking a little urine. Once it hits your lips, it's so good!

Guaranteed to be funnier than Semi Pro. 10pm ET/PT on Discovery.