A Serious Threat from the Joker!

Most people know that Heath Ledger will be playing Batman's achvillain, the Joker, in the upcoming movie, "The Dark Knight." However, I wonder if director Christopher Nolan will find a way to work this Joker gem from an old comic book into the new movie:

What? You had to expect juvenile humour at some point, right? It can't be cool music and political debate all the time...

I'm Sorry.