these day and writer and director and producer be rely more and more on the surprise end . the old art of bring a movie to closure and take all of the information we have learn through out the movie and bring it to a nice complete end and have be lose . now what we have be a movie that and no matter how complex and detailed and or frivolous and can be wrap up in 5 minute . it be all in his or her head . that explanation be the director safety net . if all else fail and or if the write wasn not that good and or if we run out of money to complete the movie and we can always say it be all in his or her head and end the movie that way . the audience will buy it because and well and none of u be psychologist and and none of u be suffer from schizophrenia ( not that we know about ) so we take the story and believe it . after all and the mind be a powerful thing . some movie have pull it off . but those movie be the reason why we be get more and more of these crap ending . every director or writer now think they can pull it off because and well and fight club do it and it make a lot of money . so we get movie like the machinist and secret window and identity and and this movie ( just to name a few ) .