"But you see Harl? I'm fixing everything. I'm leaving behind a clean, quiet universe. A place where people like me...won't ever come into existence.
This is the type of Joker I like best...the Joker who knows that he is a sick and twisted bastard and wrong. He may be insane, but he's well aware of it. I don't know if that contradicts the definition of insanity or not but interestingly enough, when googling "super-sanity" most of the hits reference the Joker (although my psych major roommate tells me that "super-sanity" doesn't actually exist).