1Kong: Skull Island
In Kong: Skull Island (2017), the actual camera that was used in the 1933 film is hidden in the scene at Hank Marlow's place - as confirmed by the film's VFX artist, Jeff White.
2Austin Powers: Goldmember
In Austin Powers: Goldmember, the news report on Dr. Evil's sentencing also features a news scrawl highlighting overly positive news about Toronto, Canada, the birthplace and hometown of Mike Myers.
3Spider-Man: Into the Spider-Verse
In Spider-Man: Into the Spider-Verse, you can see a shot of Donald Glover waking up in his Spiderman pajamas, the shot is in one of the episodes of the show community.
In “The Godfather” Michael’s soon-to-be wife stumbles. This moment refers to Mario Puzo’s book. She did that intentionally since she’s good at climbing and walking on such surfaces, she simply wanted him to touch her before marriage. It’s hinted in the movie when the other women start giggling because they know what she did.
In "Zootopia" (2016), during the chase scene in Little Rodentia, they pass by a billboard for "Thigmo Taxis". In Biology, thigmotaxis is the movement towards or away from the physical stimulus and has been extensively studied in rodents.
In District 9 (2009), the entrance to Bio-lab 01 has a sign that reads ‘Tetravaal Biosecurity’. Tetravaal would then become the robotics company featured in director Neill Blomkamp’s later movie Chappie (2015).
7Spider-Man: Into the Spider-Verse
In Spider-Man: Into the Spider-Verse, Stan Lee appears during the subway scene transition in the first act.
8Charlie and the Chocolate Factory
In Charlie and the Chocolate Factory, Charlie's father works in a factory that makes "Smilex" toothpaste. This is a reference to Tim Burton's "Batman," in which the Joker unleashes lethal "Smilex" poison upon Gotham City by hiding it within personal care items such as toothpaste.
9Spongebob’s Atlantis Squarepantis
In Spongebob’s Atlantis Squarepantis, LRH has two different colored eyes, just like his voice actor David Bowie.
In the opening scene of Liar Liar (1997), Jim Carrey is greeted by a fellow lawyer entering the courthouse. The man is Christopher Darden, who in real life was the co-prosecutor in the infamous O.J. Simpson trial.