Natalie Portman excels in this gripping ballet psychodrama from Darren Aronofsky. Peter Bradshaw applauds a film about fear, love and hatred..It centers on a performance by Natalie Portman that is nothing short of heroic, and mirrors the conflict of good and evil in Tchaikovsky s ballet "Swan Lake." It is one thing to lose yourself in your art. Portman s ballerina loses her mind. Everything about classical ballet lends itself to excess..