I'll probably end up going as a Smurf to my college Halloween party, so why don't you turn up to wherever as a Smurf, too? We can be over-the-pond Smurf buddies!

Whilst the Joker is a nice idea, I agree with Ty - everyone will want to dress up as the Joker.

You could dress up as a spork. I know a lot of people who are shit-scared of sporks.