[Note: The film""s lesser and inferior sequel was writer/director Sylvester Stallone""sStaying Alive (1983)that also starred Travolta reprising his Tony Manero role.Violated bodies and families were torn apart by the ""living dead"" creatures, illustrating how nothing was sacred in contemporary society.However, the trip was complicated because Marty and "Doc" both had to avoid encountering themselves (with split-screen images) from their first trip back there ("the consequences could be disastrous").During a search of the house, (footage that Debra initially considered leaving out of the final edit of the film), Debra""s undead brother Billy jumped on her back - and was killed when Professor Maxwell, skilled in archery, used a bow and arrow to shoot him in the head.