If you liked any of the above . . .
Then you may also like to search out: The Institute for Transacoustic Research / The (Vienna) Vegetable Orchestra / Gomme Handschuhe Doodlesack(?). But I can't quite remember exactly who performed using the sounds from distressed computers in suitcases as they were savagely chopped and hacked with axes, anybody?
Holger Czukay, co-founder of Can, studied under Karlheinz Stockhausen, who, if my memory serves me well, once wrote a passage for piano wherein the pianist was required to use his/her buttocks.