Can't Monday morning quarterback, we probably all get shot in that situation. The guy closest, I think we all need to somehow get the mindset of closing the distance and controlling the weapon. Hard to do, natural reaction is to get away. Guy who took the shot, incredible, one shot stop under extreme stress. First guy shot had a chance, really poor draw. Again, standing up probably my natural reaction, probably better to just fall down until you are sure your draw is sorted out.
But like so many other church shootings that got stopped quickly, no national news coverage.