Nilsen,
there is a documentary called "Grizzly Man" which cronicles the life of a man who lived among Grizzlys in Alaska for like a decade or maybe better. He made the rounds of late nite TV talk shows, and thought he knew the bears better than anyone else. (He probably did)
Eventually he lost it and went off the deep end. There are places in the documentary where he wails profanely on about how bad human beings are, then only a few seconds later he records a second take where he is reserved and thoughtful talking of the beauty of the nature that surrounds him. An obvious case of some sort of mental disorder, as lay diagnosed by yours truely.
He ends up being devoured along with his girlfriend, the audio of whole scene being recorded by his camera.