That's so typical of the San Fran crowd.
If the man had wanted to be a real hero he'd have leaped in front of the Mayor and taken both rounds.
(Yes, I am probably as tired of this Harvey Milk story being pushed down everyone's throat as is Arnold).
In fairness, Milk and Moscone were killed in different rooms minutes apart. Your scenerio makes it seem possible that Milk could have saved Moscone, when in fact he could not.