Continuity mistake: Teddy gets cocaine smeared all over his left cheek when he is snorting cocaine in his car, but when the camera shifts to a front view, the cocaine is gone, not visible. (00:10:25)
Continuity mistake: During the ring scene, the queen tells Eric to enjoy himself, her left arm lowered. A shot later, it's resting on his arm.
Continuity mistake: Mr. Snowdon's whiteboard sketch of Santa's face and hat has a more polished look after he turns and faces his class. Santa's eyes are more oval-shaped, and his mouth looks more like a semi-circle than a rounded checkmark. Alternating views show the more distorted facial features. Mr. Snowdon's height relative to the white band on Santa's hat also varies. (00:02:09)
Continuity mistake: The cucumber half is facing in the opposite direction after the camera shift. The flesh is toward the right of the screen, then to the left. Also, the knife Margaret set near the corner of the table next to the cucumber half disappears; it should be below her right arm when she is reaching for her drink. (00:15:17)