National Lampoon's Christmas Vacation

Audio problem: During dinner on Christmas Eve there is a shot of the cat chewing on Christmas lights. The sound of the cat chewing is a fraction of a second off.

manthabeat

Factual error: In the scene where Clark is working on the lights the full moon is shown. This is December 14th according to the advent calendar. On December 24th when Santa's sleigh goes sailing over the moon, it is still full.

David Schaal

More mistakes in National Lampoon's Christmas Vacation

Todd: Hey, Griswold. Where do you think you're gonna put a tree that big?
Clark: Bend over and I'll show you.
Todd: You've got a lot of nerve talking to me like that, Griswold.
Clark: I wasn't talking to you.

More quotes from National Lampoon's Christmas Vacation

Trivia: Eddie's son, Rocky, doesn't speak one line in the entire film.

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Question: At the Christmas dinner, what is the tree ornament behind Clark as he's cutting the turkey?

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