If you see a ghost you certainly have a psychotic problem. I would think you need to have a mental disease that would be linked to paranoia. My uncle, living next to my room, is psychofrenezic, and needs to take a army of pills to lower down his psychotia. He also have illusions/hallucinations beceause of its mental shock he had ( personnal business ).
Healthy persons can also get to have illusions sometimes, not meaning they're brain handicaped, there is a variety of reason for that.
i hope no one believes in ghosts beceause he saw a movie clip over the net. it's very, very easy to add a ghost in a movie where the persons ( actors ) were doing a kind of theatre. It's very easy to edit a movie clip, many times a tape where a man have been in an illegal place to do illegal actions had the man in it erased, so nothing could be sued against him
