We generally frown upon doing duos for Halloween costumes. Halloween is a perfect time to assert your intellectual independence and creative chops, so why not strike out on your own this year? After all, you wouldn’t want your partner getting all the credit for that charmingly clever Fred and Ginger costume. If you do end up disregarding our advice, at least stay away from the following ten (and worst) choices. Don one of these numbers on October 31, and you’ll scare the hell out of everyone – and not in a good way.