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Crazy as Hell is a 2002 psychological film that is based on the 1982 novel Satan: His Psychotherapy and Cure by the Unfortunate Dr. Kassler, J.S.P.S. by Jeremy Leven and follows Dr. Ty Adams, an aggressive and overconfident psychiatrist producing a documentary film about a nearby state-run mental hospital. While treating a new patient who claims to be Satan, Dr. Adams begins to question his own perceptions.