Craziness scale:
Heath Ledger's Joker < Christian Bale's American Psycho < Jack Black's character in Be Kind Rewind.
seriously. he got his brain magnetized by a horrific accident, wiped out the entire catalogue of a small-time video store, and then proceeded to re-film classic movies such as Ghostbusters with Mos Def in order to please a crazy old lady with dementia. What fucks with that. I don't even think Christian Bale could hang out with Mos Def without the racial tension making him uncomfortable, let alone when he's using that "hey guys I sound like I'm suffering from a mild form of retardation when in reality I sound eloquent and well-spoken, which means you should give me an oscar or something" voice he used in 16 Blocks with John McClane.