"I may be insane, but I'm not crazy!" That line, delivered by the Batman's greatest foe in a 1973 comic book story called "The Joker's Five-Way Revenge," strikes me as the very essence of this iconic rogue. It's funny, it's weird and it refers to the Joker's realization that he's made Batman so angry that it's much smarter to turn and run than try to fight him. He may be a clown, but he's no fool.
