You Can't Make this Stuff Up

Greatest Unscripted Movie Moments

They're some of the most unforgettable lines, scenes and moments ever to grace the big screen — and they weren't even supposed to happen.

These are 12 of the greatest unscripted moments in movie history.—David Onda (Photos: Columbia, Touchstone, Miramax)

The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.

More from this Slideshow

0 of 0

You Can't Make t... They're some of the most unforgettable lines, scenes and moments ever to grace the big screen — and they weren't even supposed to happen.

These are 12 of the greatest unscripted moments in movie history.—David Onda (Photos: Columbia, Touchstone, Miramax)

The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.
'You're Gonna Ne... "Jaws" star Roy Scheider uttered this classic line the first time his character sees just how big his fishy nemesis is. What most people don't know is that the iconic quip was improvised by Scheider and was not in the final script.—David Onda (Photo: Universal)

The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.
The Cinderella S... There is no shortage of quotable lines in the Bill Murray comedy classic, 'Caddyshack' but did you know one of its best scenes was unscripted? In the scene, Murray's character Carl Spackler narrates a story — a "Cinderella story" — about an unknown golfer winning the Masters before swinging his golf club at a flower and yelling, "It's in the hole!"

In his 1999 book, Murray wrote, "The Cinderella Story was a spur-of-the-moment idea. 'Get me some flowers,' I said. 'Four rows of mums.'"—David Onda (Photo: Orion Pictures)

The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.
'The Godfather' ... The speckled feline that famously perches on Marlon Brando's lap in the Francis Ford Coppola classic "The Godfather" was not scripted to be there. Brando reportedly found the cat lurking around the set and picked it up to pet it. The animal subsequently got a role as an extra. We guess it was an offer that kitty couldn't refuse.—David Onda (Photo: Paramount)

The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.
'You Talkin' to ... It's one of the most famous lines in cinema. It also never appeared in the script for the 1976 Robert De Niro movie "Taxi Driver." According to screenwriter Paul Schrader, the script simply said "Travis speaks to himself in the mirror," and De Niro improvised the classic dialogue.—David Onda (Photo: Columbia)

The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.
'RoboCop' Loogie After taking a sound beating from RoboCop, villain Clarence Boddicker (played by actor Kurtwood Smith) is hauled in to the police station, where he brilliantly spits a bloody gob onto an officer's paperwork. In a recent interview with Xfinity Entertainment, Smith said the moment was not in the script, but discussed with the director right before the scene. "But we forgot to tell the actor that I was going to be talking to [about it]," Smith said. "So when I did it, he was not very happy."—David Onda (Photo: Orion Pictures)

The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.
'I'm Walkin' Her... In the 1969 classic "Midnight Cowboy," actors Dustin Hoffman and Jon Voigt walk down a busy New York City sidewalk having a conversation. The filming of the scene was timed so the two could cross the street without walking into traffic. Unfortunately, one pushy taxi cab drove through the shot anyway. Fortunately, Hoffman pushed forward, smacking the hood of the taxi and giving the driver a piece of his mind with this famous line.—David Onda (Photo: United Artists)

The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.
Han Solo Is Awar... In one of the final scenes of "Star Wars: The Empire Strikes Back," Han Solo (Harrison Ford) is about to be frozen in carbonite when Princess Leia (Carrie Fisher) professes her feelings for the intergalactic smuggler by saying, "I love you." The script called for Ford to reciprocate the sentiment, but instead he improvised, famously saying, "I know."—David Onda (Photo: Fox)

The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.
Can You Hear Me ... In the 1992 film "Reservoir Dogs," actor Michael Madsen plays a thief who tortures his police officer hostage by cutting off the cop's ear. Fortunately, director Quentin Tarantino didn't tell Madsen what to do with the prosthetic ear after chopping it off, so he talked into it — "Hey, what's going on? You hear that?" — and tossed it to the side. And we've never heard "Stuck in the Middle with You" the same way since.—David Onda (Photo: Miramax)

The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.
The 'Pretty Woma... When Richard Gere playfully snaps the jewelry box closed as Julia Robert reaches for her extravagant new necklace, the actress lets out one of the most famous laughs in movie history. As it turns out, the laugh was born of legitimate amusement and surprise because Gere's playful action was completely unplanned.—David Onda (Photo: Touchstone)

The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.
'Full Metal' Fur... People love to quote actor R. Lee Ermey's insult-laden diatribes in the 1987 film "Full Metal Jacket." As it turns out, the rants were completely improvised by Ermey, who was inspired by his own experiences as a U.S. Marine drill instructor during the Vietnam War.—David Onda (Photo: Warner Bros)

The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.
'Here's Johnny!' As Jack Torrance in the 1980 horror film "The Shining," Jack Nicholson rips his way through the Overlook Hotel in pursuit of his movie wife, played by Shelley Duvall. In the movie's most quoted moment, Torrance chops a hole in a bathroom door, announcing to his terrified spouse — "Here's Johnny!" The famous line was Nicholson's own creation. Well, besides all those times Ed McMahon said it.—David Onda (Photo: Warner Bros)

The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.
Singing in the R... After struggling for five days with one of the most violent scenes in "A Clockwork Orange," director Stanley Kubrick asked star Malcolm McDowell, "Can you dance?" McDowell proceeded to dance and sing "I'm Singing in the Rain" as he attacked his helpless victim. The result was an almost sickening combination of joy and malice.—David Onda (Photo: Warner Bros)

The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.
Sequels Better T... If at first you don't succeed, try again! Check out the movie sequels that were better than their predecessors by clicking here.

The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.