Mirror Mirror - She Got Nailed
In one scene, the old woman went to the house to get the mirror and the mirror poked nails into both of her hands and she runs out of the house screaming in pain. In the scene after that, when she opens the door for Nikki, look at her hands. There are no signs of her being poked, her hands are smooth and creamy. In the short time that had elapsed, there should have been the nail wounds.