Highly controversial piece of American direct cinema, observing the inhabitants of an institute for the "criminally insane". Wiseman lets the camera linger on some gravely disturbing moments, illustrating the dehumanised existence of the severely mentally ill. Filming such scenes clearly raises some difficult ethical issues, although the long takes and sparse style do nothing to glamorise or make fun of the subject. The film was banned in the USA until 1992. ****