A different scene but, in my opinion, it is the greatest scene ever filmed; Michael, Sollazzo and Captain McCluskey at the Italian Restaurant. Start to finish, the tension, the dialogue, the ambience; everything is perfect.
When Sollazzo said "I'm not that clever" at 5:14, Michael decided he had heard enough and it was time to terminate with extreme prejudice.
It's amazing how a movie from that long ago seems as real and suspenseful as if it were made yesterday. Michael's brain is going a hundred miles an hour, until he bursts into action without hesitation.