“I’ll have what she’s having.”
The scene: Sally screams out as if she were having a climax while eating with Harry at dinner. The “When Harry Met Sally” movie produced many famous lines that are still quoted to this day.
Everybody remembers that infamous scream that Sally, played by Meg Ryan, busts out, making every single dinner turn their head in awe, with an old lady even saying to the waiter, “I’ll have what she’s having.” You’d think that was definitely in the script, but no! It was completely improvised at the suggestion of Billy Crystal, and it worked like a charm.
Harry Potter and the Deathly Hallows, Part 2
“Well, I must say I’d hoped for better.”
The scene: Voldemort’s speech announcing Harry Potter is dead. One of the most famous lines is when Voldemort announces Harry Potter’s death. That speech was rehearsed by Ralph Fiennes many times, but the actor never said it in the same way twice.
The cast and crew were always waiting excitedly for the definitive line. Finally, as Voldemort declares that whoever doesn’t join him will die, the only person to step forward is Neville Longbottom, and so Voldemort cruelly says, “Well, I must say I’d hoped for better.” Of course, apart from the actual scene, everybody on set laughed.
His Girl Friday
“The last man who said that to me was Archie Leach.”
The scene: The Mayor tells Walter Burns that he’s through. “His Girl Friday” is a classic from all the way back in the 30s.
When murderer Earl Williams (played by John Qualen) is found at the desk, the Mayor says to Walter Burns (played by Cary Grant) that “whistling in the dark isn’t going to help him this time. You’re through.” Walter replies, “Listen, the last man that said that to me was Archie Leach just a wee before he cut his throat.” Grant completely improvised this line, which was particularly funny since Archie Leach was Cary Grant’s birth name!
A Nightmare on Elm Street 3: Dream Warriors
“Welcome to prime time, b**ch!”
The scene: Freddy Krueger pops out a TV and kills a kid with it. Freddy Krueger (Robert Englund) became a symbol of evil, and the fact that he’s such a terrific actor made it all that much scarier.
In 1987’s "A Nightmare on Elm Street 3: Dream Warriors," Freddy improvised one of the best lines in the movie, saying, “Welcome to prime time, b**ch!” while he rips out a TV set and kills one of the characters with it. You have to admit, apart from the whole being a terrifying horror film, that line is quite hilarious.
Broken Arrow
“Yeah. Ain’t it cool?”
The scene: Riley Hale tells Vic Deakins he’s out of his mind for stealing a nuclear warhead. In the 1996 “Broken Arrow” movie, Travolta plays Major Vic Deakins, a renegade soldier who steals a nuclear warhead, and Captain Riley Hale (Christian Slater) has to find a way to stop him.
One of the best scenes in the movie is when Hale tells Deakins, “you’re out of your mind,” and then Travolta, completely improvised, answers, “yeah. Ain’t it cool?” Completely unhinged, absolutely perfect! Woo loved it so much that he used it in the next film he starred in the following year - "Face/Off."