In Crazy, Stupid, Love (2011) Emily Weaver (Julianne Moore) married to Cal Weaver (Steve Carrell) is “Assistant to the Vice President” in her company a subtle nod to the “Assistant (to the) Regional Manager” gag in The Office (US) which Steve starred in.
In How the Grinch Stole Christmas (2000), the grinch alphabetically lists people from the the phone book. The one he says he “loathes entirely” foreshadows his childhood feud with Mayor Augustus Maywho.
The Incredibles (2004) has desktop computers, cell phones, and other modern technologies despite being set in 1962 because in a super hero universe with mad scientists and villians some of that tech would bleed into the civilian world through osmosis
In Saturday Night Fever (1977) Tony offers to walk Stephanie home, but she says no and goes away. In the sequel, Staying Alive (1983) Tony offers to walk Jackie home, and she says no. But Tony has learned from his mistake so he walks her home anyway.
In Project Hail Mary (2026), Rocky gives Grace a thumbs-down in this scene after their ships have already detached. Because sound cannot travel through space but light can, Rocky can no longer "see" the ship with his echolocation but knows Grace can see him, making the gesture an act of faith.
In The Aviator (2004), Howard Hughes' steak suddenly becomes bloody after a disruption to his routine. The motif of bloody steak in discomfort appears again later, at Katharine Hepburn's house.