When the killer cuts off a woman's face, the killer reveals to the camera a face mask which would be used for skin care, covered in blood with the holes for eyes and the mouth, while the eyelids, nose and mouth are still stuck on. It would also be impossible for the killer to cut off her entire face in such a short period of time since skin is so thick, and her skin could not possibly be as thin as a cosmetic facial mask.
The woman who had her eyeballs torn out with a screwdriver by the killer, had her mouth covered by the killer's gloved hand and got her empty eye sockets continuously stabbed would not have been even strong enough to even try to find her way out of the place she was held captive in. She would probably have been dead already from blood loss, lack of oxygen and having part of her optic nerve and brain damaged before she could even try to get away from the killer.