Continuity mistake: During the scene when Martin and Cray are in the morgue, Cray throws the baseball bat at Martin. When Cray throws it it is upside down but when Martin catches it, it is rightside up. However, you never see the bat flip.
Continuity mistake: When the main character goes to check the place where the dead bodies lie, after having seen the red light flash, the rope above the supposedly dead body is still swinging. If you keep watching it you can see that it keeps moving with the same frequency.