Looking for an easy, fast costume idea for a party tomorrow or just for greeting trick or treaters? Enter Captain Hindsight! For those of you who don't know, Captain Hindsight is a small character from South Park. He has possibly the worst superhero power ever: He can tell exactly what would have prevented the incident, but he can't prevent it in advance. People still look up to him as a superhero, and he can fly.
Captain Hindsight wears yellow and a red cape, and his icon is a giant eye. If you want to go even simpler, just wear any superhero costume with a cape, and make a paper eye to put on your chest. People may not get the South Park reference, so fortunately it is funny even if they don't. You can add fake glasses too. Go around giving your friends post-useful advice all night.