One Flew Over the Cuckoo's Nest 1975

In this clean, orderly, disciplined world, who needs guys like McMurphy? Everybody.

Directed by Miloš Forman

A petty criminal fakes insanity to serve his sentence in a mental ward rather than prison. He soon finds himself as a leader to the other patients—and an enemy to the cruel, domineering nurse who runs the ward.