(Disney's "The Mighty Ducks" was once described as "Bad News Bears on Ice.")

John G has this theory that almost every action film can be described as "Die Hard in/on a X". I've heard another theory that most films can be summarised as "Dude, Where's My X?". John R got the prize for this one: The opening scenes of "Saving Private Ryan" == "Dude, where's my leg?"