16. MELINDA DILLION GETS TOP BILLING.

Getting top billing must have been quite a thrill for actress Melinda Dillon… until the actual credits rolled and her name was spelled incorrectly!

17. RALPHIE SHOOTS THREE TIMES, HITS FOUR.

When Ralphie is forced to defend his family against the rascally Black Bart (in his own imagination), he shoots three bad guys before his nemesis Bart escapes. But when the pile of bad guys is shown with their eyes X’ed out, there are four of them.

18. THREE-BARREL HINGED GLASSES WEREN’T A THING EITHER.

After nearly shooting his eye out on Christmas morning, Ralphie steps on his own glasses, revealing them to use a three-barrel hinge connector, which would not have been possible until the 1980s.

19. SPEAKING OF TOOTHY ANACHRONISMS…

In his attempts to make Ralphie’s life a living hell, we get an up-close view of the braces worn by Scut the bully. They’re the kind that are directly bonded to the front of his teeth, a process that wasn’t invented until the 1970s. Until then, metal braces were wrapped around the teeth.

20. A BOWLING BALL FOR CHRISTMAS.

Old Man Parker is thrilled when his wife gifts him with a shiny new blue bowling ball for Christmas. There’s just one problem: colored bowling balls weren’t introduced until the 1960s.

Credits: mentalfloss.com

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