Halloween!

We're in the midst of making some big Halloween costume decisions around here, so I'd love some creativity from my readers! We need to dress up, since it's not a big holiday here but it is starting to grow and as the USA representatives among our friends, we need to do something great! But it has to be something the Spaniards will understand, ideally will not make us look awful, we don't want to scare people, and we'd like to not spend too much money.... Bring on your creativity! Prizes for the winner!