Most people either plan a simple, fun Halloween costume idea in advance or, more often than not, just throw something together on October 31st from spare parts. Got a striped shirt and a beanie? Boom. Waldo. Got a bathrobe and a curtain rod? Boom. Gandalf after a shower. Then there are the people who take Halloween very seriously. Uh, maybe a little too seriously. Their costumes range from political, to abstract, to downright mind-bending. It’s safe to say these Halloween costume ideas can’t be beat.