One place I worked had the soundtrack CD and we'd play it often. I'd never seen the film.
Years later I was trying to track down the music, but all I could remember was "Koyaanisqatsi" intoned on the soundtrack and no idea how to spell it.
One day I walked past the local arthouse cinema playing Powaqqatsi and I wondered if that be related. I went in with no idea what to expect.
About 40 minutes in and not a word of dialogue, I realised this wasn't just the intro. Just wow. 😉