The Joker applause – The Dark Knight (2008)
Heath Ledger improvised Joker’s slow clap in the jail cell scene, adding an extra layer of menace.
“I know” – Star Wars: Episode V – The Empire Strikes Back (1980)
Instead of replying “I love you too,” Harrison Ford improvised the cooler and now legendary response.
The cup smash – Django Unchained (2012)
When Leonardo DiCaprio cut his hand on glass, he kept going, and the scene became even more intense.
The food fight – Animal House (1978)
John Belushi improvised much of the chaos, helping define the film’s anarchic energy.
“Here’s Johnny” – The Shining (1980)
Jack Nicholson came up with the line during filming, and it became one of horror’s most iconic moments.
The dance scene – Pulp Fiction (1994)
Parts of the dance between John Travolta and Uma Thurman were developed spontaneously during rehearsal.
