The Odd Couple meets Road Trip. Zach Galifianakis and Robert Downey Jr. are polar opposites, the former an uptight business man, the latter a failing actor with a penchant for pot smoking. Thrown off an airplane at the same time, and both heading in the same direction, they must travel across America in time for Robert Downey Jr. to be home for his first child's birth. See, that's where the name came from. Definitely worth a watch if you liked The Hangover, or anything Robert Downey Jr. has ever done.