没看懂的进来：

The first half of the performance is ruined when Nina is dropped by her partner, who appears to be sexually involved with Lily. Tomas is enraged, and during the intermission, Nina is attacked by Lily in her dressing room. Lily once again morphs into Nina, and Nina struggles against her. Nina pushes Lily into a full-length mirror and it shatters. Nina then uses a shard of glass to stab her. Unsure of what to do, Nina hides the bleeding body in her bathroom and takes the stage as the Black Swan. She dances fervently and as she dances, she begins to physically transform into a large Black Swan on stage. She dances the part better than ever and the crowd is amazed, giving her a standing ovation. After leaving the stage Nina seizes the moment to kiss Tomas passionately, after finally effectively seducing him with her movements. She then leaves the stage and goes to change for the next act, placing a towel over the growing pool of blood emerging from under the bathroom door. Suddenly, the real Lily arrives to congratulate Nina for her incredible performance. Nina is shocked, moving the towel to see no blood. She touches her chest and finds the shard of glass embedded in it. (In her unhinged and delusional mind, Nina has just stabbed herself imaging herself as Lily). Nina slowly removes the mirror shard and takes the stage as the White Swan despite her bleeding wound. She dances beautifully, and the audience does not notice the spot of blood forming under her white costume. In the final act, as the Swan Queen commits suicide and she calmly leaps from the constructed hill on the stunt mattress, the spot of blood growing and staining her white feathered dress. Tomas is overjoyed and newly infatuated with Nina and crouches down to congratulate her, a crowd of ballerinas gathering around the star. Lily suddenly gasps, the first to notice the huge stain of blood forming at Nina's chest. Someone calls for help, and Tomas frantically asks her what she did. Nina calmly and quietly utters that she was "perfect." The crowd roars as Nina dies.