I highly recommend the 2005 documentary, Grizzly Man which chronicles the life and death of filmmaker and environmentalist Timothy Treadwell. makes use of Treadwell's amazing footage of grizzlies and foxes, taken during his thirteen summers camping among the grizzlies. Treadwell believed that he had figured out how to live among these dangerous animals without harm, and was tragically proven wrong. The film is touching and chilling at times, as Werner Herzog methodically documents Timothy's spiral into delusions and anthromorphism.