Movie trailers for Black Swan

"And seeing the mum at the finale applauding & smiling made me think "ok so 5mins before she was trying to prevent her from leaving but now is proud mum?".
Which suggested to me the entire mum issue was yet another result of Nina being loopy."

Having just watched it again, it's pretty obvious to me at least that the mum is a borderline personality wreck. That would actually fit perfectly into this film because people with BPD see things in extreme black and white, good and bad. Her reaction to the cake rejection when she goes to throw the whole thing in the bin, the control and obsession over her daughter, perfectionism and keeping away other people is all classic BPD behaviour. In all likelihood, Nina smashing her hand in a door and then walking out would cause the mother to reject her and it's extremely unlikely she would then go to the show. I imagine that would be a fantasy, which brings up the question, how in the blue hell are you supposed to be able to distinguish between fantasy and reality?

I will say I found the bluray a little disappointing. The convertion isn't the highest quality and it isn't helped by large parts of the film being so dark. The club scene in particular I found near impossible to track.