Character mistake: When Ash talks to someone, a small scene plays out, and he will suddenly be standing there with nothing in his hand. But the moment the scene ends, he suddenly will still be holding whatever weapon he had before talking, like the shovel.
Continuity mistake: Ash can sit there and bash on the NPC cops over and over with a shovel, and even slash them with the chainsaw, and the cop will fall down and yell stop. Then get back up completely uninjured and still have a conversation with Ash as if nothing happened.