God, you make me want to puke. I mean, what is it with you? What made you what you are? Girlfriend killed by the mob, maybe? Brother carved up by some mugger? Something like that, I bet. Something like that... Something like that happened to me, you know. I... I'm not exactly sure what it was. Sometimes I remember it one way, sometimes another... If I'm going to have a past, I prefer it to be multiple choice!
Joker, Batman: The Killing Joke