“She Talks in Her Sleep” (Indiana Jones and the Last Crusade)

In the late ’80s, Indiana Jones movies were the finest example of an adventure/action blockbuster series. But when the producers decided to add Sean Connery to the mix (cast as Jones’s father), the 1989 classic Indiana Jones and the Last Crusade gained a whole new momentum.

But who could’ve guessed that one of Connery’s most memorable lines was unscripted? When asked about how he knew Elsa Schneider was a Nazi, he replied by saying, “She talks in her sleep.” The line was received with an all-too-honest smile by Harrison Ford, who wasn’t ready for the off-script moment, and a big thumbs up from director Steven Spielberg, who loved it instantly.