I finally got around to seeing You're Gonna Miss Me, a 2005 documentary about the musician Roky Erickson. Erickson was the leader of the 13th Floor Elevators (here's a 1960s video of the band), a psychedelic group from Austin that was hugely influential to the more well-known San Francisco bands of the era.
The film chronicles Erickson's crippling problems with severe mental illness, which, for a long time, weren't able to stop him from writing and playing amazing songs (Here's a song . In fact, his music just got better and better (Listen to Two Headed Dog from 1980). He finally dropped out though, thanks in a large part to bad family dynamics, and for 12 years he lived in a squalid apartment doing nothing but sitting in a chair listening to all his radios and TVs playing at the same time (to drown out noises in his head?). He lost all interest in music.
The ending is uplifting; it turns out to be a moving documentary about the unselfish love of a man trying to give his brilliant older brother another chance. It's great to see how much better he is doing now, as seen here in this short clip.