danika play with supernatural element but be in fact a psychological thriller . for the horror fan there will not be enough scare . but the scare that be in this movie be very effective . i must admit that marisa tomei often get on my nerve and but if you see the end you will understand why . and then it become clear that marisa tomei have do a wonderful job . the great thing about this movie be the use of hallucination . you never know if it real or not . they be so convincing that one minute you will doubt the main character . and the other minute you will believe her that she be have vision . also i think that the end they choose make sense . i can not go into more deeper without spoil the plot . but have read several book on he subject it be not uncommon for this to happen . for this movie it be very important that you watch it closely otherwise you will miss important clue for understand the end . great movie . check it out .