Unreliable Narrator
Telling the story through a character you can't trust, because they are lying, mentally unwell or fooling themselves. At some point, you have to rethink what you were told.
Chinatown
The whole film is told from Gittes' point of view. You know what he knows, you discover what he discovers and you are wrong alongside him. His masculine confidence and professional expertise get taken apart piece by piece. When the investigation fails, it's his way of seeing the world that fails.
The Usual Suspects
Verbal Kint tells the whole story of the film to a federal agent. Then the final minutes reveal that everything you watched was fiction. He made it up on the spot, using objects he could see in the interrogation room.

