I haven't seen this yet, but the buzz is awfully good....

http://www.behindthemaskthemovie.com/

http://www.imdb.com/title/tt0437857/

The little trailer at the beginning of the site is interesting. Hmm... It's basically a slasher movie where the main character is the killer, eh? xD

I read several synopses of the movie. Without spoiling it, it sounds as if the protagonist is a guy obsessed with the sub-genre of homicidal maniac horror films, such as Friday the 13th and Halloween. He is an expert on the subject and also wishes to become a homicidal maniac in real life. He evidently befriends a college film major and takes her and her film crew on a tour of his own environment where he plans to make his wishes become reality. They are evidently the targets of his mania.