Movies are forever. Movie scripts, on the other hand, are hardly set in stone. Throughout the history of cinema, some of the best, most iconic lines that ever existed were created on the spot, delivered accidentally, or made up by the inventive minds of Hollywood actors.

There’s no shortage of iconic improvised lines in this compilation, from Orson Welles’ The Third Man to Walt Disney’s Frozen! And some of these are so good, clever, and memorable that it’s almost unbelievable to think they were never part of plan A. Has your favorite film made it to the list?

“I Don’t Care” (The Fugitive)

The Fugitive was a great early ’90s movie. It depicted a cat-and-mouse chase between an innocent man accused of murdering his wife, played by Harrison Ford, and the U.S. Marshal tasked with putting him in jail, played by Tommy Lee Jones.

When the two rivals finally stumble upon one another in a tunnel chase scene, Ford’s character appeals to Jones by saying, “I didn’t kill my wife!” Jones was supposed to answer with, “That’s not my problem,” but he decided to change the script just a little bit… He went for “I don’t care,” and the improvised line resonated perfectly with his character’s blind respect for rules over justice.