Celebrated on 31st October every year, Halloween is an occasion when costumes go from funny to berserk to a point where it could scare the hell out of you. Earlier people used to be happy prancing around with simple things like bed sheets with two holes cut in them but today people are using make up to go that extra mile to give you nightmares. Some of these shocking costumes will definitely get under your skin. I doubt any one is getting candy with these blood thirsty costumes. These are few of the most terrifying Halloween costumes out there.