We bet you've never noticed these movie mistakes!
Click through the gallery to see eight errors in The Wizard of Oz, Forrest Gump and more of your favorite flicks!
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The Wizard of Oz
The length of Dorothy's hair changes throughout the 1939 classic — who knew?!
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When Jenny introduces Forrest to their son for the first time, the iron set on the ironing board behind her magically moves position between shots.
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One of the chariots in the 2000 historical drama Gladiator has a visible gas tank — oops!
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One scene in 1977's Star Wars accidentally features a Stormtrooper hitting his head on a doorway as he walks through the threshold.
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We bet you never noticed Rose's beauty mark switches sides of her face throughout the movie!
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Back to the Future
When Marty dresses up as Darth Vader to convince his dad, George McFly, to go to the school dance, the hairdryer tucked into his belt magically disappears between shots.
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Dallas Buyers Club
Though Dallas Buyers Club is set in the 1980s, the Lamborghini pictured on a poster behind Matthew McConaughey's character in one scene didn't come out until 2011!
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Pirates of the Caribbean
In 2003's Pirates of the Caribbean: The Curse of the Black Pearl, a movie crew member — clad in a cowboy hat and sunglasses! — can be seen in the background of one scene.