National Lampoon's Christmas Vacation

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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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Chosen answer: Because there was cat food in her jello mould. He's pointing out the absurdity of someone adding cat food to jello.

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