A good one is Timothy Treadwell, the "Grizzly Man" who would go out and camp in Alaska to be with the bears there, he seemed to think he had some sort of communion with them and could interact on their level.
God knows how, but he managed to get away with it for a good few years until the inevitable happened and a hungry Bear tore him to pieces and ate him all up for supper. Oh, and on that particular trip he also took along his girlfriend who was deathly afraid of Bears (my theory being that she wasn't a complete fucking mentalist like him) - and the Bear ripped her up and ate her too for good measure.