I can't believe this one hasn't been reviewed, this is a fucking classic.
Sleepaway camp takes the jason genre in a surreal and interesting direction. Summer camp movies are bound to have patterned themes; Chicks that grew tits over the summer and turned into raging bitches/whores, ridiculous wardrobes, and absurd exchanges. Sleepaway managed to still make up some new shit and cause discomfort.
After a boating accident kills a father and one of his two kids, the surviving child is sent to with an aunt. Angela is quiet and terrified of swimming because of the accident. Rick is protective of his cousin and spends most of his time defending her from jerkasses and other misbehavior. Angela's quiet nature and her "special treatment" of not having to participate in all events, and especially not having to swim, and being able to shower by herself without the rest of the girls earns her the disdain and mistreatment by some of the other campers. Meanwhile Paul, a fellow camper, sees more to Angela and begins valiantly courting her, despite interference and derision.
Eventually accidents start happening, bodies start piling and the ending is a stunning wrapup and answer to a few questions, as well as a few surreal scenes.
5 stars, bitches. Once you've seen it, you too will know all there is to know. *jazz hands*