" the wall". it was a "must see" for the art school students in the  90's. not requested by the teacher, but the tapes are just circulating in between the students. i watched it several times with my then boyfriend.
Other must sees, or "circulating-under-the-ground" movies also include" the world of senses" and maybe "Ceaser"(? not sure about the name). all are artistic, violent, sexual. but, all serious art pieces.
"The world of senses" was very dark, sad, and crazy in my memory. and "Ceaser" was just a crowd of flesh.( everybody was naked basicly) so it becomes boring.
This scene of flowers was one of the most famous one from the movie.it is very powerful and way too sharp compare to any ordinary music videos. i cannot watch this everyday, but it is great art, good to see once a while.