Cannibal Holocaust (1980)

Ruggero Deodato's found-footage horror was so realistic that the director was arrested on murder charges and had to produce the living actors in court to prove no one had been killed. The film did, however, include the real killing of several animals on camera. Banned in over 50 countries, it pioneered the found-footage genre later used by The Blair Witch Project and Paranormal Activity, while raising questions about the exploitation of indigenous peoples in cinema that remain relevant.