Continuity mistake: During the girls' 1st escape attempt, the beast is wearing a track suit as he's trying to force his way into their room. Once he gets into the room, he's seen wearing the janitorial uniform.
Suggested correction: This is not a mistake. Since the man has split personalities, the change of clothes is meant to signify his personality changing. The clothes are obviously changed very quick, but it is supposed to add a supernatural effect to the film.
Continuity mistake: The Beast bends the bars, but when Casey is found, the bars are normal.
Factual error: The girls are looking through a rather wide gap between the door and the door-sill. If a gap were that wide the door lock would not be very secure, and just a little force would open it. (00:19:25)
