Yes I wanted to send it the day you told me about it, but I forgot...I don't have know how am able to forget things like that.
And finally got the time to watch the trailer, I'm so sorry!!! hahahha. It seems like interesting movie/book. So the girl is a nice person but on that particular night, everything changes and she turns into an evil person? But her boyfriend tries to help her. Did I get it right? :)