In Anaconda (1997), a shot of the riverboat is played in reverse to show the boat reversing, however, the waterfall in the shot is clearly flowing backward.
12Mission Impossible: Fallout
In Mission Impossible: Fallout (2018), Lane hyperventilates before being submerged, giving more oxygen to the blood/brain than a single deep breath, allowing him to stay conscious longer.
13Star Wars: The Empire Strikes Back
In Star Wars: The Empire Strikes Back (1980) Luke tells to R2 to remain in the ship in various events and he doesn't do it. The last person to say that to R2 was Anakin in Star Wars: Revenge of the Sith (2005) and he never returned.
14Harry Potter and the Prisoner of Azkaban
In Harry Potter and the Prisoner of Azkaban, Professor Lupin sleeps through most of the train ride to Hogwarts. The date is the 1st of September, 1993. There really was a full moon the previous night. He was exhausted because he'd transformed the night before.
In Coraline (2009), the crew spent 800 hours painting 250,000 pieces of popcorn—pink on the outside, red on the kernel—to stand in as blossoms for the nearly 70 trees.
In Incredibles (2004), Elastigirl’s original suit was red and Mr. Incredible’s suit was blue. Their first child’s name was Violet (a combination of red and blue).
17The Secret World of Arrietty
When a tiny person pours tea from a tiny teapot in 'The Secret World of Arrietty (2010)', it comes out as a droplet.
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In 'The Matrix' (1999) the way Neo and Morpheus attack each other with the same move, their clothes, and head/hair forms the Ying-Yang Symbol.
In the Harry Potter Movies (2001-2011), Snape’s costume was the only one that never changed. According to costume designer, Jany Temine: "Because it was perfect. When something is perfect you cannot change it.” She joined during the production of Prisoner of Azkaban and changed most costumes except Snape’s.
20Men in Black
In Men in Black 2 (2002), J tells T to “Get married. Have a bunch of kids" and then hooks him up with a waitress (played by Alexandra O Hara). In Men in Black 3 (2012), the waitress reappears as a housewife with several kids (she is played by the same actress).