Continuity mistake: In the deer scene the deer breaks the window but the next shot shows the window unbroken.
Factual error: In the scene where the Gingerdead Man is finally defeated, he fires a six shot revolver at the hero seventeen times without reloading.
Continuity mistake: Near the end of the film, when Ranger boss Rick Bailey drives up to the ranger station, the licence plate number on his Jeep is 39697, but when Ranger Danielle crashes it into the cave, it's 37504.
Other mistake: After the Joker has become a vampire, you can still see his reflection in metal poles and such while he is chasing Batman in the bloodbank. (00:47:00 - 00:49:00)
Continuity mistake: Julian and Becky get to school and see one of their friends sparring a bit. His ex Katie arrives and he tries to kiss her. She pushes him away and then grabs again the strap of her bag, but at the cut she is not holding it anymore. (00:11:50)
Visible crew/equipment: Near the end, when the monster has crashed through the wall of the bar, the monster rips off his deer skull mask/helmet to show his true face. As soon as he tears the mask/helmet away, look carefully to the right of the screen. For a split second, you can see the black outline of a person standing beside it. (This is revealed in the commentary.)