“Not you. I don’t even know you.”
The scene: Lilly is running down the street, trying to get Mia’s attention. In the scene where Lilly (Heather Matarazzo) is running down the street trying to get to her friend Mia (Anne Hathaway), she tries screaming out so Mia slows down.
But instead, some other guy turns around. To this, Matarazzo ad-libbed the funny comeback, “Not you, I don’t even know you.” As the actress said in a later interview, this was apparently the producer’s suggestion, which, like the rest of the crew, just felt like a very close group of friends working together.
Die Hard
“Yippee-ki-yay, mother***!”
The scene: John McClane talks to villain Hans Gruber on the radio. In this scene, Gruber asks if he's just an American that has seen too many cowboy movies, to which McClane replies, "Yippee-ki-yay, mother****!" As it turns out, that line was written differently in the script.
The screenwriter had written "Yippee-ki-yay, a***hole," but Willis changed it during the scene to amuse the film crew. Neither thought the line would make it into the movie, considering this was 1988, and such open profanity in films wasn't easy to get past movie studios. Nevertheless, this scene became one of cinema history's most famous lines.
Clueless
"I'm totally buggin' myself."
The scene: Josh is talking to Murray and Travis at a wedding while eating cake. At the end of the film, Josh, Murray, and Travis are all sitting together with their respective girlfriends at a wedding.
When suddenly, Josh, as he's shoving a huge piece of cake in his mouth, says, "I’m buggin’ myself,” in response to his friends saying they were bugging out because their girls were already planning their weddings. The line was improvised entirely by Rudd and had the other guys laughing uncontrollably because of how he said it. It was all real!
The Princess Bride
“Have fun storming the castle!”
The scene: Westley and his friends run off to Humperdinck’s castle, and Miracle Max says goodbye. What a classic from the late 80s! Rob Reiner’s "The Princess Bride" is a classic fairytale with intelligent, dark humor, a brilliant script, and a fantastic cast.
This includes the famous scene where Miracle Max and his wife, played by Carol Kane, are waving goodbye to Westley and his friends as they run off to Humperdinck’s castle. Crystal yells, “Have fun storming the castle!” which was just one of the hundreds of lines that would make the movie hilarious and super fun to watch.
How to Lose a Guy in 10 Days
“You can’t watch Meg Ryan for two hours and not be thinking about another girl.”
The scene: Andie starts going off on Benjamin in the middle of a movie theater. "How to Lose a Guy in 10 Days" was incredibly hilarious, as Andie Anderson (Kate Hudson) goes out of her way to get on Benjamin’s (Matthew McConaughey) nerves and get rid of him.
At some point, a loud and enraged Hudson exclaims, “You can’t watch Meg Ryan for two hours and not be thinking about another girl!” This line was improvised! Hudson was usually encouraged by director Donald Petrie to ad-lib and catch Matt by surprise. And she did so brilliantly with this line.