When Ray and Jack are outside looking for the electrical box, they meet up and speak with the butler, Charles, the camera working can be seen on the back windows panning to the left (Charlies: "Miss Naibert has ideas...You better do what she wants" (around an hour into he movie)).
It's an interesting goof considering all the mirrors on-screen in the movie.
Det. Sanders tell Elizabeth's parent that he is placing her under psychiatric arrest. While he can send her to the hospital for a 72 hour psychiatric evaluation to see if she is mentally competent to be arrested, there is no such thing as a psychiatric arrest.