Revealing mistake: When the boys are racing away on their bicycles from the Feds, the stunt doubles for Elliott and his friends are obviously way too tall to be children.
Revealing mistake: When the bugs crawl out of E.G. Marshall's mouth, it is obviously a dummy.
Revealing mistake: While escaping from the orgy raid, Valeria stops and kills a few pursuers. However, her last strike never makes contact with the guard.
Revealing mistake: During the autopsy scene, it's obvious that the Panther is still breathing when it's supposed to be dead.
Revealing mistake: The witch grabs a branded iron and burns the baby's hand. Although she is holding it, the hand doesn't move a single inch, revealing it's a prop.