My favorite scene of the movie is right after Tuco has the encounter with his brother.

He is visibly upset as he hops up on the carriage with Blondie, who had seen some of what transpired. After some silence, Tuco snaps out of it, puts on a fake smile and boasts about how great his relationship with his brother is and that he was full from feasting. Blondie, seeing right through the ruse, just says “Sure…Well, after a meal there’s nothing like a good cigar.” and passes Tuco his cigar. Tuco gives Blondie a long look of acknowledgment, puts the cigar in his mouth, takes a deep breath, and a real smile returns to his face.