Friday the 13th, Part 2 (1981)

The second entry in the long-running horror series focuses on a group of teenage would-be counselors converging on Camp Crystal Lake for training under the tutelage of head counselor Paul (John Furey). Inevitably, Paul relates the story of Jason Voorhees (Warrington Gillette), a boy who ostensibly drowned at the camp and whose mother murdered a group of counselors in revenge. No one takes the tale seriously until a very much alive Jason begins gruesomely eliminating people.