This scene really gets me, I'm not an overly emotional person (I don't think I've cried in six years), its just raw emotion. Robin Williams was a genius, we focus so much on his comedic ability but he was an all round phenomenal actor and Damon is excellent in this scene. Men just aren't conditioned/allowed to show their emotions like this, I can't help but wonder if we were and more young men had mentors like Sean in their life, how different would the world be?
If you haven't seen Good Will Hunting, don't watch this, watch the movie instead