[8] A dorky teenager (Aaron Johnson) decides to dress up like a superhero and help people in need. He encounters a few other kids with similar ambitions, and before you know it, you have a hyper-violent, low-rent, joyous abomination of the superhero flick. Director and co-screenwriter Matthew Vaughn (Layer Cake) takes some unpredictable turns, railing against our expectations to create some terrific edge-of-your-seat moments. Nothing …