There are a lot of plot holes in this movie. If the demon wants to possess a man's body, why did he do it in roundabout ways by possessing & killing the entire female family members? Was it to terrorise them? If it were, then make them know what they were up against before killing them. Terror is when people know that they can't run away from what they're up against. Not just screaming at random, it just made the characters downright crazy.