In The Godfather Lenny Montana (Luca Brasi) was so nervous about working with Marlon Brando that in the first take of their scene together, he flubbed some lines. Director Francis Ford Coppola liked the genuine nervousness and used it in the final cut. The scenes of Luca practicing his speech were added later.
Gaston Witting
I was lucky enough to see this masterpiece in theaters last night, and it was absolutely terrific. Even though I’ve seen it a thousand times before, seeing it on the big screen was incredible.