GTA IV Trailer References Documentary Film

So for those of you who have watched the GTA IV trailer, you'll notice that the first 30 seconds of the trailer or so are just bits of scenery set to music.  Well that music is the score to an indie documentary film called "Koyaanisqatsi" which means "Life out of Balance".  The visual style of the first 30 seconds is also very reminiscent of the film with sped up video of city skylines.  I highly recommend the film to anyone who even sort of enjoys documentaries.  There's no dialogue of any kind but the film clearly has a message.  I should mention that the film was produced by Francis Ford Coppola.

There are also two sequels although I have not seen either of them yet.