I just found out about this one today.
Koyaanisqatsi is a 1983 art film that has no characters, no coherent storyline, and no dialogue. Instead, the film is conveyed through a series of single film shots, some conventional, and others derived using time-lapse photography, as well as the accompanying score. Although the film strongly hints towards an intended critique of humanity's problems such as pollution, listlessness, and over-consumption, ultimately the viewer is left to make his or her own conclusions.
I think that you'll either find it to be poignant, sensually overwhelming, or hopelessly pretentious. Anyway, I'd encourage you all to see it, at least for its score and bold cinematographic techniques, both of which become more and more intense as the film progresses. If you click the above link, I am sorry about the ads.
On a more personal note, I've decided to retire the grades that I usually assign to each film that I comment on or recommend here.
Koyaanisqatsi, I feel, deserves an "A" for its aforementioned musical score and cinematographic techniques. However, being used to action in my films, I felt a little deteched from the movie and would have probably given it a "B" because of that. This is a strictly personal issue, however, and I feel that the grade assigned by somebody with different preferences would probably differ from my own. In the future, if I thought that a movie was good and would recommend it, I'll mention that explicitly. If it was bad or mediocre, I'll probably mention that as well.