I'll be going as a Half-Life 2 head-crab zombie. It seems pretty simple, white cardigan, blue pants and shirt, brown shoes, lots of fake blood. Perhaps I'll have to stand in a bucket in the yard and pour it over. I would just need a head-crab. I've seen plush ones on the internet, hopefully someone still makes them. I'll just have to practice the anguished screams and grunts.