Continuity mistake: As Jason approaches the smashed barn door, some of the wooden planks in the left side of the door disappear between shots. (01:12:50)
Continuity mistake: When Jerry has Charley pinned to the cracked bedroom wall by his neck, he suddenly drags him over to the window a few feet away - which is nailed securely to the frame - and lifts it up effortlessly. Next, we see Charley looking over to his right side, but now he's back up against the cracked wall in this shot, not a window. (00:29:50)
Continuity mistake: When Tina runs up the stairs and then falls through, she lands on a blanket but when she stands up, the blanket is gone.
Continuity mistake: When Cain and West are in the morgue trying to re-animate the cadaver, a phone rings outside at the security desk and when we see it, the buttons are facing outward, but when Megan goes down to the security desk, we see the phone is now turned completely around. (00:49:32 - 00:56:54)