In Interstellar on the water planet, the soundtrack in the background has a prominent ticking noise. These ticks happen every 1.25 seconds. Each tick you hear is a whole day passing on Earth.
In Inside Out, the pizza toppings were changed from broccolis to bell peppers in Japan, since kids in Japan don’t like bell peppers. Pixar localized the joke.
If you play both The Cloverfield Paradox (2018) and Cloverfield (2008) at the same time, the precise moment the Particle accelerator fires in The Cloverfield Paradox, it causes the monster to appear in Cloverfield, linking the two universes.
4Revenge of the Sith
In Star Wars Episode 3: Revenge of the Sith (2005), you can see one B1 BattleDroid in the background telling his friend to look at grievous activate his lightsabers.
In Deadpool 2, one of the rednecks talking about toilet paper is actually Matt Damon in four hours’ worth of prosthetic makeup.
In Ant-Man (2015) actor, Garrett Morris makes a brief appearance in a scene. Morris was the first person to ever portray Ant-Man in a 1979 Saturday Night Live skit called Superhero Party.
In the Incredibles 2, the painting in Helen’s hotel room is an illustration of her separation from the family.
“The Greatest Showman” has a Hugh Jackman Wolverine Easter Egg hidden in the film's end credits. The movie features title cards in the style of the silent movie era during the opening and end credits and each card is surrounded by elaborate borders and amazingly one has Jackman’s Wolverine himself featured.
In Pulp Fiction, Vincent Vega is constantly on the toilet because one of the side effects of heroin abuse is constipation.
In ‘Zootopia’ (2016), there is a brief shot of a conspiracy wall and one of the pictures is of a Sad Keanu wolf.