Natalie Portman excels in this gripping ballet psychodrama from Darren Aronofsky. Peter Bradshaw applauds a film about fear, love and hatredFantastically deranged at all times, Darren Aronofsky's ballet psycho-melodrama is a glittering, crackling, outrageously pickable scab of a film.At its centre is young ballerina Nina Sayers, played by Natalie Portman. She is beautiful, vulnerable, sexually naive and susceptible …