https://www.youtube.com/watch?v=1AvxR5vVgY4
Often regarded as the actor’s best performance to date, Williams delivered a scene-stealing performance as Sean Maguire in the modern classic, Good Will Hunting. Williams proved he can pull of a dramatic role just as easily as he could a comedic one in the turn that landed him an Academy Award for Best Supporting Actor. One scene starts out with him being all casual and friendly; he briefly snaps, losing himself in anger, before a sad gaze eclipses his face. In this marvelous acting case study of a scene, Williams displays an array of emotions within minutes.
The Cinephile Fix 