This is a terrific, insightful, eerie documentary about American horror movies, particularly the post-Vietnam game changers of the late 70s and early 80s. It focuses on the early, seminal work of Wes Craven, John Carpenter, David Cronenberg, Tobe Hooper, George Romero, and Tom Savini. Great use of Godspeed! You Black Emperor music along the way.
* Note: Very graphic and NSFW.