I recently saw the documentary Hype!. I have a strange fascination with music "scenes" or "movements" that transformed a geographical area, music subculture, or entire music genres, and then disappeared. Hype! gave me the lowdown on everything I didn't already know about the goings-on of the bands that materialized in the Seattle area in the mid 80s to mid 90s. I've always known that "grunge" was a made up word, but now that I've seen Hype!, I have more of the facts of the so-called "grunge" movement.
If you in any way have an interest in learning exactly what happened in the "grunge movement," this documentary will more or less lay it all out for you.
The first big surprise I can tell you is that there really wasn't a movement at all. At least not an organized one. Any "movement" was the product of everyone outside of the "movement" deciding there should be a movement.