No question that moment is thee, but I realy thought Michael realized how well he could handle things was the way he convinced that nurse to move his father's bed to another room, and in the same scene sarcastically tell Sonny on the phont "No, I won't panic."
To that point: the novel notes that Michael was "surprised" at how steady his hands were vis-a-vis Enzo's.
Another detail: Enzo da Baker was dressed pretty spiffily for a guy who was a POW just four months earlier.
