The Ending (spoiler)
(Spoiler)
In the last scene, after the Stooges leave the party, they're sitting in an OPEN CAR, in OUTER SPACE (!), happily singing the song, "Have Rocket, Will Travel". The complete impossibility of this set-up has always been hilarious to me. In a movie full of unbelievable situations, this one tops them all!
Does anyone else have a favorite scene?