The "deep story" of Requiem for a Dream —directed by Darren Aronofsky and based on the novel by Hubert Selby Jr.—is a harrowing descent into the through the lens of addiction.
The film frequently uses a camera rig attached to the actor's body, facing them directly. This makes the background move while the actor remains stationary in the frame, heightening the sense of subjective paranoia. "Lux Aeterna": Index Of Requiem For A Dream