The first time I viewed Koyaanisqatsi I was blown away. I was a youngster when I saw it, and the documentary's god-like view upon nature versus human society was an eye-opener, reflecting the massive, restless ant colony that we are.
The mantra-like, atmospheric soundtrack by Philip Glass effectively complements the hypnotic time-lapse and slow-motion footage, shifting from goosebumps-inducing nature imagery to man-made modern structures and machinery, and massive human crowds, racing around in their huge metropolitan cities.
When the end of Koyaanisqatsi nears, the depiction of modern day chaos becomes almost unbearable, and you start longing back to the calmness of the beautiful scenery at the start of the documentary. I guess this is the message that its creator Godfrey Reggio wanted to convey — how detached we are from our roots, drowning in our self-made chaos in stead of living in an equilibrium with nature.