A triumph of low-end production design, shot in sizzling, solarized black and white, and driven by a propulsive, insinuating score, Pi is a horror movie that makes you think and an indie film that makes you squirm.
The A.V. Club
Aronofsky's ability to capture the rush and confusion of racing down a timeline toward infinity, only to suddenly slam into a dead end, makes for impressive and occasionally disturbing stuff.
Roger EbertChicago Sun-Times
The seductive thing about Aronofsky's film is that it is halfway plausible in terms of modern physics and math.
With this odd mixture of elements the film's tone is gloomy, portentous, and hysterical, yet at the same time strangely earnest and square, as if David Lynch had tried to somehow make a movie version of Scientific American.