Faces of Death is an extremely graphic banned 1978 documentary film directed by John Alan Schwartz about people dying, often in horrific ways.
The documentary uses both fake footage of peoples last moments spliced with real footage of executions, murders, surgery and accidents. There are even clips people eating the brains of a monkey, people getting eaten by animals and satanic rituals featuring dead bodies. Overall it is a very disturbing documentary that should not be watched unless you have the stomach for it.
The key point you have to remember with Faces of Death is that much of the footage has been faked. With that said there is a lot that is genuine and gory.