New documentary with a 'scientific' approach to the phenomenon...

...'Sleep disorder that makes people see demons', you say? Well, perhaps then this documentary will explain: why different people tend to suffer from these 'demon' fantasies when they sleep in a certain room which doesn't look any different than the one next, why some witnesses have these experiences only in a certain house and they completely cease when they move out, why people around the globe see the same figures (usually a shadow silhouette wearing a hat and long coat/cloak, or a hooded shadow man in dark robe, or simply a "blackeρ than black" mist/blob), even if they are of a different age, or have been raised in totally different cultural environments (or even come from defferent periods in time), figures which happen to be witnessed by people under totally different conditions too (awake, outdoors and not imobilized), at times even by more than one persons at the same time, and why these so called 'demons' sometimes leave back physical evidence, move objects, switch lights on and off... 

Yes, perhaps this documentary will explain all these. Or, perhaps not... Perhaps these incidents, which are a large percentage of the total accounts, will better be left untouched, as they usually are by those 'scientific' researches that claim to have solved the issue of these experiences and that it's a completely natural condition, and there's no external factor involved...

On second thought, I would rather recommend this...

or, this...

or, this...