Continuity mistake: Towards the beginning when the gang is breaking the door chain and lock to the cemetery, the chain is still hanging inside two door notches after the lock is broke, as soon as the door is pushed and the camera changes view to inside the cemetery, the chain is gone. (00:14:40)
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: Trash's fantasy about being eaten alive comes true when several zombies attack her, taking bites out of her before she drowns in the Trioxin-water mix. When she reanimates, she's now got no bite marks on her.
Continuity mistake: When they pull the half female zombie through the window, they lay a large piece of cardboard over it. An instant later, the cardboard is off to the side.
Continuity mistake: In the beginning when Frank is giving Freddy the warehouse tour, Frank mentions and points out wheelchairs that are off camera which is fine but when the headless corpse is trashing the warehouse, the wheelchairs are nowhere to be seen.
Continuity mistake: Ernie is working on a cadaver when Burt arrives. After they cremate the body parts Burt brought over, there is one more shot where the feet of the cadaver can be seen under the blue sheet on the table. The next time we see the table, it is empty. It is never seen or referred to again.
Continuity mistake: Earnie splashes the jar of acid on Freddy's face but in a later close up shot, just Freddy's eyes are burned.
Continuity mistake: When Freddy pours the popcorn out of the box at the beginning of the movie he sits the box down at an angle with the flaps open. But when he and Frank come back up stairs from the basement the box is back in place and the flaps are closed.