 This documentary is often humorous in its otherwise clinical approach to how people judge others, find ways to get along, or become managers and followers. Dr. Mark McDermott and Dr. Phil Zimbardo launched a three-day experiment called "The Human Zoo" and used hidden cameras to observe and explain how a group of strangers interacted during what the subjects know is a psychological experiment, although they do not know what the purpose of it is, nor that they are being surveyed almost constantly. Immediate friendships and hostilities are watched by the professors; these scenes are inter-cut with other researchers exploring similar psychological dynamics. Actor/comedian Charlie Skelton, among others, cooperates to test British citizens who do not know they are being filmed.