Huge yes. I find this movie terrifying. I think the horror of the threat is brilliantly crafted. The early interviews introduce the threat as something known, concrete, or tangible (a serial killer, a hairy woman, some kind of demonic presence, a bunch of violent rednecks), but then the film constantly redefines and obscures the nature of the threat while simultaneously increasing the danger. Nothing scares me more than the unknown. The Blair Witch, whatever it is, is the perfect expression of that terror.