The Mountain (Zombie Edition) From Game of Thrones
What to wear: Unless the person reading this is Shaq, we're going to go ahead and assume you're not nine feet tall, so don't worry about your size. This costume is a little tough, though, considering the undead Gregor Clegane rocks a full suit of golden armour. You can always wear a gold long-sleeved shirt and trousers, and then just buy a helmet if you want to keep things simple. Just make sure you make any visible skin look like the grey, rotting flesh of a corpse.
How to act: Totally silent and totally terrifying.