Other mistake: When Evil Ed picks up Jake and throws him headfirst into the lightbulb, watch the speed that he hits it and then falls away from it; he moves far to slowly.
Other mistake: When Ash decapitates Henrietta with the chainsaw at the end, watch very closely: her head comes off about five centimetres BELOW where Ash hits her.
Trivia: When Ash is possessed of the evil presence and beats up the girl, he throws her on the couch and chuckles evilly (or hornily, same dif). He is stopped from committing further molestation by the sight of that ugly piece of jewelry that he gave to Linda earlier. When the necklace gets a closeup, the chain forms the outline of a skull.