He features on the soundtrack of one of my favourite films, Blue Collar (1978), in which a group of Michigan car factory workers (played by Harvey Keitel, Richard Pryor and Yaphet Kotto) revolt against the company and the union which is in cahoots with it by staging a robbery. I love the way in the title sequence that the sounds of the factory are built into the music, with Ry Cooder on guitar and Beefheart on vocals.
When I was a school boy,
teacher said study as hard as you can,
It didn't make no difference,
I'm just a hard workin' fucked over man
Incidentally I once saw this film at the Ritzy in Brixton and they accidentally showed the reels in the wrong order - beginning, end then middle, Godard style