The beginning
Personally, I liked the opening sequence where the girl gets stabbed and then takes forever to actually die, (and then having it turn out to be a scene from a movie that was being shot) -- However, when you think about it, it doesn't make a whole lot of sense, because supposedly she was just supposed to be stabbed and die -- and yet, they just keep the camera rolling.
Doesn't the director know the Russian word for "cut"?