Quote from Martin in It's Hard to Say Goodbye If You Won't Leave
Niles: You know, that's the improper use of a hyphen. Martin: Somehow I don't think Maurie Dingman will mind. Niles: Then I'm sure he won't notice that missing comma and that run-on sentence. Although this is a particularly glaring error. It's best not to end a sentence with a preposition. [Martin starts writing] Not to be technical, but "Off" is a preposition, too.