I like the flashback scene at the end of part II, when Fredo tries to congratulate Mike, and then Sonny breaks up the handshake. To me, there's a lot funny about that scene: Fredo's use of the word "swell", the look on his face and the way he clutches his wrist after. Actually, Fredo was ripping it up that whole scene. His "they didn't know it was pop's birthday" comment is priceless. And I like how after Mike says that he enlisted in the marines, everyone gets quiet for a second, then Fredo snaps a carrot or something in half, with a comical look of disbelief on his face.

I don't know why, but ever since I saw that scene, I've always wanted to break up a handshake the way Sonny does. Unfortunately, I never had the opportunity to do so.