This one has a really good concept .. about two world together with their own gravity and their rules. I had a class about media and there is one powerful tool in media called binary opposition. And this movie is very rich of this binary opposition: up and down, rich and poor, man and woman. I love this concept so much, it is really original. Too bad the ending is not so good, it is fast and it seems like there is no significant conflict or climax ... such a waste of great concept ... but worth watching!