9) Goodfellas (1990)

Mostly improvised, Joe Pesci's "How am I funny? Like I'm a clown to you?" was born out of an actual incident Pesci had as a young actor. Martin Scorsese encouraged improvisation during rehearsals to get the flavor right for the mob. Pesci was able to merge so effortlessly the comedy and evilness that he and Ray Liotta say no words during the scene. The result is one of Goodfellas’ most iconic moments, showcasing Pesci’s improvisational genius and defining his character’s unpredictable volatility.
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Edited by Abhimanyu Sharma