Wait till they get a load of me.

Two-thirds of the way through drawing this I began to regret it, but it was too late to stop by then - there's no denying that Jack Nicholson's Joker was the highlight of Tim Burton's Batman (now re-dubbed Batman 89), but there's also no denying that he's a pretty creepy guy to have in your sketchbook. I may get around to drawing Michael Keaton's Batman eventually, just to balance out the darkness with a bit... more darkness, I suppose.