...Back to School (1986)

Rodney Dangerfield hits one out of the park in this classic comedy about a rich man who goes Back to School with his college freshman son. It is pure Dangerfield as the self-deprecating one-liners come so fast and furious that if you laugh, you might miss one. Sally Kellerman, a young Robert Downey, Jr. and Oingo Boingo add romance, quirk and music respectively but I'm telling you, don't laugh.