One Flew Over The Cuckoo's Nest (1975)

  Rebel with no cause McMurphy enters a mental institution in an effort to avoid ordinary punishment for his crimes. Not standing any form of incarceration, he will start creating anarchy and obstacles for the oppressing doctors. The fellow voluntary patients start to like him and take him as their leader...
  This film is a very important landmark in modern cinema. Like many other films in the 70's, One Flew Over... examines the vast subject of mental illnesses but the director was clever enough not to leave it there. Milos Forman goes another step forward and leaves subtle comments on how modern society confronts mental illnesses and a sad realization on who is really free and happy.
  Jack Nicholson was already a very active actor by then but this film was just another proof of his great talent. I can't really tell if his character is crazy or just faking it and that is just exactly the point of it all! The rest of the cast is equally and maybe even more exceptional ; Danny DeVito, Christopher Lloyd, Sydney Lassick, Brad Dourif, Will Sampson, William Redfield and super-bitch Louise Fletcher.
Must watch this :  besides its seemingly depressive mood, this film is actually a shine of hope in the darkness. You can watch it in times of bad mood and I promise it will leave you with a sense of bittersweet happiness!
Trailer
http://www.imdb.com/title/tt0073486/?ref_=nv_sr_1

One gram of soma, please

I don't know, I feel too small for my problems

We gonna get ass, right?