Trivia: When Steven is in Jason's house, we see the "Necronomicon", or "Book of the Dead" from the "Evil Dead" movies. He even picks up the book and flips through it. The director has said this is because Jason is a deadite, as his mother made a pact with the devil to bring him back from the dead.
Continuity mistake: At the start of the film Jason chases Agent Marcus from the cabin, and she is barefoot. But in the shots of her running through the woods, in some shots she is barefoot, in others she has white socks and big black boots on, and in others she has flesh-coloured trainers on. (00:05:10)Hamster