Nobody behaves like a human being (SPOILERS)
One of the strangest things about Fulci's movies is how the characters don't react to certain situations like a normal human being would, especially their survival instincts. In "Zombi 2", people just stand there while zombies walk slowly towards them and they are eventually bitten and killed (or their eyeballs are poked out). In "House By The Cemetery", the real estate lady doesn't even try and fight back or grab the fire poker or deflect it with her hands. You'd think after the first puncture, she wouldn't want the second one to happen at all, but no, she just sort of...lays there with her arms stiffly at her sides and makes noises? Later, Dr. Freudstein is just standing there doing nothing and the family doesn't even try and run past him to escape.
Also, Bob hears Ann screaming bloody murder in the cellar and instead of reacting, he just sort of wanders around collecting toys before going down to "help" her. Then later Bob is in the cellar screaming (poetic justice!) and his mother is also screaming and trying to open the cellar door, and the father wanders onto this scene and starts slowwwwwwwwwwwly walking toward the sounds. Can you imagine hearing your wife and child screaming and instead of rushing in to see what was wrong, instead you creep slowly through the living room like that?
I know the films aren't supposed to be realistic, but it's hard to relate to the victims because of this. I can overlook it in "Zombi 2", but for some reason "House By The Cemetery" is so full of it that it annoys me.