Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not at all what I expected...in a bad way

I guess I should have read more about the film before I saw it. I thought the movie was about a dancer whose understudy, desperate for the part, starts doing things that make the dancer think she's going crazy. But it turns out (SPOILER ALERT), the dancer really IS crazy. The film was filled with icky and disturbing gross-out scenes that really weren't necessary. Striving for perfection causing a ballerina to slowly go crazy is a valid plot, and they could have done something with that, but they went about it all the wrong way.I like "art-house" movies and even some film noire, and a film doesn't have to have a good ending (or even be entirely clear) for me to appreciate it. But even though the acting was good, the dancing was good, and, of course, the music was good, I really can't say I gained anything by watching this film. I rarely give movies just one star, but I genuinely did hate this film.