*puts on lab coat and science glasses* *grabs my multiple science degrees and my peer reviewed (and accepted) thesis in the latest journal of science* "Well we can rule out the cause as being a ghost, demon, or spiritual influence because you didn't see or hear or feel anything of the sort. Science says 'There is no such thing as the supernatural,' Bill Nye 23:12. It was probably air currents or latent magnetism from the Earth. Otherwise, it had to be an off-screen accomplice or special effects, as those are the most logical conclusions. All hail atheism!" Edit: "I forgot to add: it's also probably the result of some nearby piping vibrating at a certain frequency causing him to hallucinate the whole thing." But he got it on film. "Then you probably have vibrating piping in your own home causing you to hallucinate."