Famous Movie Lines That Were Actually Improvised
Full Metal Jacket
Many people aren’t aware that although most of the people involved in Full Metal Jacket were professional actors, one very key individual was not.
That’s right, R. Lee Ermey was not part of the original cast, but was hired on as a consultant.

Full Metal Jacket
Director Stanley Kubrick loved Ermey immediately, however, and had him join the cast as the drill sergeant.
He also allowed Ermey to improvise many of his lines as he psychologically tortured his new recruits.