Willy Wonka & the Chocolate Factory
We will always remember Gene Wilder and his excellent Willy Wonka performance. When we were introduced to the strange character, we saw him limping before he launched into a somersault. It wasn’t in the script and Wilder himself apparently came up with the idea. Good move, we daresay.
RoboCop
Sometimes, the director is in on the secret. This applies to the “Give me my f*ckin’ phone call” line in the movie. Apparently, Kurtwood Smith invented the line but he wanted the approval of the director first. Paul Verhoeven liked it but they decided to keep it a secret from the others in order to elicit genuine reactions. It worked!