The Exorcist (1973) One of the most famous horror films of all time happens to center around a case of demonic possession. 12-year-old Regan must endure the entity within her, while her mother enlists local clergy to help. To me, The Exorcist is the most classic example of possession in film. Not Only does it follow all of the rules, it sets many of them. This film evokes classic paranormal cases like the Enfield Poltergeist and fictionalizes it in a way that feels both groun