Regarding our original concept of good vs evil clowns, we still wanted to blend some sort of comedy into the piece, whether it was slapstick or just plain black dark humour. I feel that it was summed up best by this image of Heath Ledger's Joker in a female nurse's outfit, as it mixes the best of both. His dark maniacal nature, and the staple of a clown in an outfit that comically contrasts his true nature (e.g. when a clown goes to bed at night as a regular person again).
I can just see him saying: OUT PLEASE. I have a city to destroy, heroes to humiliate and people to scare, you are just wasting my time. If I ask Nicely can I come out? O forget it I'm stuck! I'll just have to wait.