I thought that these links might be useful in case anyone was interested in watching some clips from a few of the films mentioned in the article:
Gates of Heaven: http://www.errolmorris.com/film/gates_clip.html
Werner Herzog Eats His Shoe: http://www.youtube.com/watch?v=nRiBIhcWGJE&search=herzog
Edison's film Electrocuting an Elephant: http://www.23nlpeople.com/media/~elephant_dead.mpg
Topsy (the elephant) killed three people and was essentially sentenced to death. Edison decided to film Topsy's death in order to promote his own electric current (DC) by using the AC current to kill various animals, thus proving it was "dangerous."