Sorry screenwriters, I hate to break it to you but some of the most famous moments moments in cinema are the one's that are not written on paper. An actor just thinks up an idea right then and there and suddenly...
Ta da! Cinema magic!
1. The Dark Knight
Heath ledger's role as the Joker in "The Dark Knight" is considered to be the "The Performance of a lifetime" due to his outstanding ability to stay in character. In the infamous jail scene, Jim Gordon was promoted to the position of Commissioner by the Mayor. As all of the officers in the room jump at the chance to congratulate Gordon on his new position, the Joker begins to slow clap, never changing the smug look on his creepy face. Ledger's appearance in this scene was completely improvised, this goes to show how immensely dark the Joker role was.
2. Dumb and Dumber
Jim Carrey and Jeff Daniels put on an amazing performance showing how moronic the pair is in many scenes of the film. In the car trip scene, Carrey made what is easily the most annoying sound in the history of ever. The hit man became annoyed with Carrey and reacted with genuine frustration, which in turn made the scene so much funnier.
3. Star Wars Episode V: The Empire Strikes Back
In Episode V of the "Stat Wars" franchise Princess Leia, Played by Carrie Fisher, declared her love for Han Solo, played by Harrison Ford. The line that was supposed to be read by ford was "I love you too." but he did not really think that the line for Solo's character, so he changed the line to, "I know." These 2 words are now one of the most legendary lines in the franchise.
4. The Shining
The Stephen King inspired film brings chills to anyone who watches it. One of the scenes from the film credits it's scarriness to Jack Nicholson's improvisation. Wendy and her son, Danny, are hiding from the deranged Jack. While smashing the door with an ax, Nicholson sticks his head through a hole in the wood and yells "Here's Johnny." Made famous buy "The Tonight Show With Johnny Carson", Nicholson figured the saying would be a good hair-raising addition to the already disturbing scene.
While casting the waters in an attempt to lure the savage great white shark within range, Police Chief Brody (Roy Scheider) gets his first look at how massive the killer shark really is. Filled with fear he stands up and says the now famous line to Orca Captain Quint (Robert Shaw) completely off-script, "You're going to need a bigger boat.” Turns out, he was right.