After Cease To Exist
With a soundtrack by the ever-disturbing Throbbing Gristle, and the very slow, methodical castration scene, this is probably the most disturbing movie I've ever seen.
The worst bit really was that with weirdos like TG involved, you can never be really sure that the castration wasn't real...
Kudos to TG for producing the wickedly misnamed "20 Jazz Funk Greats" LP, though: complete with awful 70s easy-listening Jazz band cover, one can only hope that somewhere a copy still lurks, badly-catalogued in an easy-listening section, waiting for a unsuspecting buyer in search of shopping and lift music...