Both great. Another is when Vito uncovers Sonny and tells Bonasera: "Look how they massacred my boy."
Some brilliant gestures:
Brando, pointing at Tom to get Bonasera a drink in the opening sequence.
Brando taking in a deep breath when he tells Bonasera, "...and then they would fear you..."
Brando's sort-of "aw, shucks" look when Bonasera says, "Be my friend?" (And Bonasera practically swallowing his tongue while he says it.)
Brando gesturing for Tom to push in his chair at the Don's Convention.
Brando putting his hand over his heart and saying, "I swear, on the heads of my grandchildren..."
Oh how brilliant he was!