Creepier The 2nd Time You Watch (Major Spoiler)
After you see the movie with the knowledge that Judas had been living in the basement the whole time, you begin to realize how much of the activity was non-supernatural. For example, the part where the little girls says, "Who is that behind you?" on the webcam. Also, when the fridge is left open and there's a pickle jar on the floor. When you first watch, you think it's a ghost, but it's even creepier knowing that it was an actual person rummaging through their fridge while they were asleep! Gave me chills.
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Fear What's Inside...
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