Plot hole: As we have seen in part 1, these inbreds have high tolerance to pain. They are stabbed with different objects, hit by cars, etc. Yet in this movie the mother is in labor and acting like a normal woman giving birth. If they can't feel pain, why is she carrying on like a normal woman?
Plot hole: Why did Dale just stand there when Ma threw the barbed wire and weights at him, and not even try to run at all?
Plot hole: When Amber and Jonesy are running from the cannibal with the arrows, they are running slow and acting like they aren't even being chased. And Amber gets her shirt caught on a tree and has to slow down to put it on?
Answer: Possibly one of the girl's parents, hiding their little girl in the safe before being attacked, captured and killed by the Mutant family.
musicman