The following scenes might make you cringe. They might make you laugh. They might make you want to shoot yourself. And, most importantly, they might make you say "What the f**k was that!?"
Some of these scenes are also well-known to mainstream audiences. These scenes can be marked with an (M).
So... here we go...
Here's just a few to get us started...
Divine eats actual dog feces in John Waters' Pink Flamingos (1972) - considered to be the underground equivalent of the shower scene in Psycho (1960). (M):
http://www.youtube.com/watch?v=6KDfABlm_Rw
The deformed Lady in the Radiator sings "In Heaven" in David Lynch's Eraserhead (1977) - This original song has now become well-known. (M):
http://www.youtube.com/watch?v=Qrl3n2ZtK2E
An 8-hour shot of the Empire State Building from Andy Warhol's Empire (1964) - Classic '60s weirdness.:
http://www.youtube.com/watch?v=7idi_5IaMrk
Divine is raped by a giant lobster in John Waters' Multiple Maniacs (1970) - Now THIS is quality cinema!:
http://www.youtube.com/watch?v=RWmbwJ_iyzc
Feel free to add some more "classic" scenes to the list. You don't have to post YouTube clips with them.
Ozzymandias speaks: I've always heard of a film called "Citco-a-go-go" which was the Citco Headquarters neon sign with rock music.
Ozzymandias has spoken!!!
Dany Elfman sings in his brother's film "forbidden zone":
http://www.youtube.com/watch?v=okQxUNbqmsc&feature=related
UN CHIEN ANDALOU (1929)
(http://i161.photobucket.com/albums/t214/morrisawilliams/F171.jpg)
STREET TRASH
http://www.youtube.com/watch?v=fqbnH-vMJuo
Not the most "classic" but gotta give a shout out to the birth scene from Xtro!
http://www.youtube.com/watch?v=aIJzozj4U_I
The "killer" cuts out a woman's tongue in Blood Feast (1963):
http://www.youtube.com/watch?v=Ju1Qt_yAKcg