I saw this film in a theater then it was released, and it was one of my more memorable movie experiences. A rather longish movie, I thought it was moving a bit slow. Watchable, interesting, but not very scary. But, without actually realizing it, the tension was slowly building, building, building. Why do I say this? Because with about a half hour left of the movie, I suddenly realized I was literally sitting on the edge of my seat. I don't think this has ever happened to me before or since, with the possible exception of "The Exorcist" or "The Omen". That, my friends, is a sign of a very good film indeed: it accomplished what it set out to accomplish, which was to jangle thoroughly jangle the viewer's nerves.