Many years ago, several of us were driving up from our military base to Georgetown for Halloween. They used to block off the main street, and it was basically a huge outdoor party. We did not have costumes, so we stopped at a WalMart on the way and, after looking around, bought hunting coveralls and stuck Christmas bows all over them. Voila! Bow Hunters! It was a great costume, since it was a very cold night, and the coveralls were insulated!
ETA: I think one of the funniest costumes I saw was many years ago in Key West. It was very late--actually it's more accurate to say it was very early--and we were going down a side street, and there was some big, fat, hairy, drunk dude dressed as Mary Ann from Gilligan's Island walking toward us! He had on Daisy Dukes, a gingham shirt tied to show his belly, a wig, and an SS Minnow life ring around his neck. We couldn't stop laughing.
