The Worst Movie Mistakes in History: Holiday Edition

Let's start things off with everyone's favorite Christmas prankster, Kevin McCallister (Macaulay Culkin). In this iconic scene, Kevin is putting on some of his father's deodorant and shaving gel when a mysterious bottle of cologne pops up on the sink right before our eyes.

In this post office scene from Ron Howard's remake of the Dr. Seuss classic, we see the Grinch's clean mailbox in the background. In the next shot, it is filled with cobwebs.

During post-production, directors sometimes flip the film strip, which is what happened here in this 2003 holiday rom-com. Earlier in the film, Joanna has a missing tooth on the right side of her mouth. In a scene at the end, the missing tooth is now on the left.

The case of the missing santa hat. In this 1994 remake, while Mr. Duff is speaking with a drunk Kris Kringle at a bar, a santa hat is visible on the table. A second later, it has disappeared. 

While John McClane (Bruce Willis) is fighting terrorists upstairs, Sgt. Al (Reginald VelJohnson) is in the lobby, where a giant stage lamp is clearly reflected onto the big marble counter.

During winter, it snows and the trees lose their leaves -- unless of course you exist in the 'Gremlins' universe, where those leaves continue to grow, despite being covered in powder.

Returning to the 'Home Alone' franchise, the sequel featured a scene with Harry and Marv skating in Central Park, where Marv's hair magically changes positions each shot -- from poofy to (sort of) combed back.