11Avengers: Endgame
In Infinity War (2018), Thanos' opening monologue he says, "I know what it's like to lose.... Turns the legs to jelly." Later in Avengers: Endgame (2019) upon realizing his loss - the first thing Thanos does is take a seat.
12Spider-Man: Into the Spider-Verse
In Spider-Man: Into the Spider-Verse (2018), before meeting the other spider-people, Miles spider-sense goes off a split second later than both Gwen and Peter.
13The Spongebob Squarepants Movie
In "The Spongebob Squarepants Movie" (2004), Spongebob states he has 374 consecutive employee-of-the-month awards, this means he has been working at the Krusty Krab for a little over 31 years.
14The Chamber of Secrets
In Harry Potter and the Chamber of Secrets (2002) before Harry gets sucked into Tom riddles diary, he’s in a candlelit room. When he’s in the diary, everything is in black and white yet, we can still see the candlelight flickering on his body
15Independence Day
In Independence Day (1996) they filmed Will Smith dragging the alien across the salt flats of Utah. Will Smith improvised the "And what the hell is that smell?" Nobody warned him of the horrible smell that sometimes comes of the Great Salt Lake due to billions of dead brine shrimp each year.
16Fight Club
In Fight Club (1999), when Edward Norton's Character receives a call from Tyler Durden. There's a sign on the phone booth stating “No Incoming Calls Allowed” indicating that it’s not possible to receive incoming calls.
17Rat Race
In the film Rat Race (2001), the first cow Seth Green hits whilst hanging from a hot air balloon has a map of the world as its spots.
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18Revenge of the Sith
R2-D2 trips a battle droid in the background in Star Wars: Episode III - Revenge of the Sith (2005).
19Avengers Endgame
In Avengers Endgame, Thor's opening attack with Stormbreaker was aiming for Thanos' head, following his advice from Avengers: Infinity War.
20Deathly Hallows Part 2
The hug that Voldemort gave to Draco, in Harry Potter And The Deathly Hallows Part 2 (2011), was entirely improvised. Hence the awkwardness from both actors.