Why you really can't use pentecostal in demonic horror movies…the movie would be over. When it comes to casting out Demons, believers have ALL power and authority over demonic attacks. So if you have someone in a movie that fails to cast out a demon, then that would mean they didn't have enough faith and shouldn't have been called in the first place. But when you have someone that does have faith, then it would all be over in 2 minutes. It doesn't matter how "powerful" the demon is, they would at the very least be bound have to flee.