Dr Wilson

Revealing mistake: The family runs upstairs with the dog and the squirrel and then runs downstairs. You can see a cut in the movie, because the rug moves. (01:21:30)

Dr Wilson

Continuity mistake: When Clarke is installing the Christmas lights, the rope on the ladder keeps appearing and disappearing. (00:23:00)

Dr Wilson

Revealing mistake: When Clark is on the sled, there's one frontal shot when the snow flies in the air before he touches it.

Dr Wilson

Visible crew/equipment: When Ellen opens the door after Clark falls from the tree, there's a strange white thing visible for a few frames at the upper left of the door. Might be the hand of a crew member opening the door.

Dr Wilson

Revealing mistake: When Clark notices that Lewis has caught on fire, he's only burning when he pushes him on the ground.

Dr Wilson

Continuity mistake: After Clarke falls in the bush, the gutter repairs itself.

Dr Wilson

Continuity mistake: When Todd, the snob neighbor, falls down the stairs, his wife Margot is not visible in the bedroom. (00:38:55)

Dr Wilson

Continuity mistake: At the end of the movie, when Clark is outside of the house with Eddie's dog, all the police cars have disappeared. (01:34:10 - 01:35:00)

Dr Wilson

Continuity mistake: When Santa Clause's sled passes in front of the moon at the end, why is the sea so dark? It wasn't in previous shots.

Dr Wilson

Continuity mistake: The christmas tree is visible from the dining room, but when Lewis goes beside it to smoke a cigar, you can't see him. When the tree is on fire, you don't see Lewis again and you can only see a branch of the tree.

Dr Wilson

Continuity mistake: When Clark finally opens the christmas lights, he has the wires in his hands. The shot later, when all the family comes, the wires are not there and his arms are wide open. (00:39:55)

Dr Wilson

Continuity mistake: When Clark is holding the gutter, it bends and ice is thrown from inside of it. The problem is that you can't see any ice during the first shot when it bends, and also that the ice goes in the wrong direction. (00:24:25)

Dr Wilson

Continuity mistake: At the beginning of the movie, the Griswold family makes marks in the snow when they arrive at the tree which Clark wants. A shot later, the marks are bigger even though they haven't moved. (00:08:05)

Dr Wilson

Continuity mistake: When the squirrel is being chased by Eddie's dog, it passes through the broken door and then vanishes. (01:22:07)

Dr Wilson

Revealing mistake: When Clark falls from the top of his house, he grabs the gutter. It bends and a icicle is thrown from it to his neighbor's house. You can see the thread which guides it. (00:24:27)

Dr Wilson