Werner Herzog is the undisputed master of extreme cinema: building an opera house in the middle of the jungle; walking from Munich to Paris in the dead of winter; descending into an active volcano; living in the wilderness among grizzly bears - he has always been intrigued by the extremes of human experience. From his early movies to his later documentaries, he has made a career out of exploring the boundaries of human endurance: what we are capable of in exceptional circumstances and what these situations reveal about who we really are. During the making of his films, Herzog pushed himself and others to the limits, often putting himself in life-threatening situations. As a child in rural Bavaria, a single loaf of bread had to last his family all week. The hunger and deprivation he experienced during his early years perhaps explain his fascination with the limits of physical endurance.