When Victor is attempting to feed his mother cannelloni in their first meeting scene, the camera changes angle and she is not wearing the napkins he previously placed under her chin. When the camera moves back to another angle the napkins have miraculously returned.
In the scene where Victor played the rapist to a woman's fantasy of rape. In the first angle, the frustrated woman grabbed Victor's hand, which was holding the knife, so that it would be placed at her neck, then proceeded to use the vibrator on herself. Then when Victor says, "Whoa, whoa, whoa, what about me?" the angle changed and focused on the woman, in which Victor's hand and the knife weren't anywhere to be seen. In the next shot, Victor had his hand and knife at her neck again.