Corrected entry: The main character fires two bullets directly after each other at the beginning of the film. This cannot happen. Even an automatic handgun cannot feed another bullet into the chamber before the first one has been fired and the round casing has left the chamber.
Corrected entry: When Professor Hudgens opens the door and Commander Burke throws the knife at him. Professor Hudgens falls to the ground. When he's falling, look all the way to the right of the mirrored door to "The Darkness" You'll see a guy standing there operating the camera in the reflection. It looks like he's wear a blue shirt and tan pants. (01:21:50)