Went to see 'The Dark Knight' in the cinema tonight.
I know and admit I look into films too much sometimes! 
One of them is, where is the 'slashed mouth' idea from?
I know I originally saw it in Nip/Tuck Season 3 which features a psycho killer called The Carver who literally scored a line on either side of the mouth of his victims, like like the Joker in this film.
From Nip/Tuck
