Earlier, Regwec mentioned an unusual skintone to Ledger's Joker. With the Blu-Ray screens blasting out on beams of awesomeness across the interwebs, we can see what he meant. Notice how much darker the skin gets across the eyes and bridge of the nose. There's a mottled, uneven quality to it. I'm curious as to what might cause that sort of damage.
I love this scene. The way it's shot makes Ledger almost ghost-like, and they manage to make him look as unnatural out of his makeup as he does in it. It's just absolutely ridiculous how well they handled the Joker in this movie. Even the music, which, as far as I'm concerned, is to the Joker as John William's theme is to Superman.