Please help. Tell me the name of the movie?

Doest anyobdy know a movie with a stupid guy that goes on mars. The journey lasts like 8 months and he stays awake all this time while his friends sleep. He stays awake all the time and he uses all the food to play around and draw things. He was like a little kid. And when he arrives on Mars he starts farting and his suit becomes like a balloon lol. And his first words on Mars were It wasn't me. I remebr him saying this quote a lot in the movie:"It wasn't me" lol. Please help. I really need to know the name of the movie. Thx