Pi ***
It is about a bunch of people interested in numbers. The main character is a gifted mathematician who is in search of fundamental patterns in nature. However he suffers from serious health and mental problems. This movie is shot entirely in black and white. You can see all the techniques used in Requiem for a Dream in this movie as well. Aronofsky establishes his unique style with rapid edits and an unstable camera. I have to point out the amazing use of sound to bring out the mental and physical pain. Almost like a noise. Though it is neither as influential as Requiem nor thematically as grand as Fountain, it announces the rise of a great talent.