Remember those SAFETY films we sometimes had to watch in class? How to use electricity without burning down the house? Water safety? Drivers ed? This plays like one of those. Actually follows the rules of the form, right down to overacting, people getting FREAKED when things go wrong...and the inevitable BAD STUFF when the poor saps DON'T obey the RULES. In this context, the film is almost fascinating. It's like it's a health film from some alternative universe where this stuff REALLY WORKS..and they HAVE to put out public service movies, to prevent people from having street fights between good and bad spirits... The dialog is up to K. Gordon Murray's usual high standards of total overkill, and the special effects actually have a kick to them..Of course, you get more questions then answers...like just who IS that dude at the door??? The whole film has a nice slow eerie vibe that builds right up to the end..and if you liked to wait for the car crash, the electrical fire, or the drowning in the safety films, this one won't disappoint.