I find it comforting and yet disturbing at the same time of our obedience to authority. This video shows the ease one can enforce one's will upon another especially if that person has any kind of authority.
[video]http://videosift.com/video/The-Original-Milgram-Experiment-1961[/video]
[video]http://videosift.com/video/The-Original-Milgram-Experiment-1961[/video]