I watched Blair Witch on DVD, and it pretty much seemed to live up to the hype that it was scary, but presented in a new, unique "low budget production" way. I enjoyed it, but the scare wore off soon after the film finished, and I transitioned back to reality.
Then, after the film, I have a habit of exploring other DVD features, to appreciate dropped scenes, directors opinions, and other "behind the scenes" information that make DVDs a great way to watch movies. I started watching some of the "Extras" including clips that weren't in the film. There were a series of interviews with fellow students, professor, neighbors, family members, and a lot of news clips, which were intended to introduce the film, but in the end, all of it was cut.
Maybe it was the late night, combined with a couple of beers (nothing stronger or hallucinogenic I swear), but these clips seemed so realistic that I started to wonder -- was this actually a true story using real footage from the disappeared students? For some reason, I found this thought way more terrifying than the movie itself. As the doubt increased, panic started setting in, combined with disgust in humanity, or lack of belief, that a commercial film would be made using real footage from real students that mysteriously disappeared.
Of course, half of me still thought -- no way! it can't be true. But just the same, doubt started creeping in and there was no way I was in any mental state to go to bed and sleep. I desperately started looking on the DVD box, and elsewhere for a clue that this was a creative work of fiction. I finally thought to replay the film itself, looking at the beginning, and the end, for the disclaimer and confirmation that "this story is pure fiction -- any resemblance to real persons or events is coincidence", which luckily I found, and managed to calm down.
Didn't watch any of the sequels though.