Upon its 1980 release, this long-banned exploitation title left director Ruggero Deodato in a thorny situation with Italian authorities who thought he had made a snuff film rather than a brutal cult film. The main reason for this is Deodato's believe-it-or-not use of shaky, handheld cameras to bolster the film's "authenticity," even though it captures medieval-level cruelty (think: ultraviolence upped ten notches). The plot itself is standard-issue now — four documentary filmmakers go to the Amazon to shoot the indigenous but soon disappear, leaving only a few tell-tale reels — but it's the whoa-inducing content that necessitates this disclaimer: what you are about to see will disturb you.