This guy did good. Very good.
As for the 'brandishing' bit, well, if you display your firearm with the obvious next intent of firing it if pressed, where is 'brandishing' superceded by 'legal use of lethal force to prevent bodily harm to oneself or another'?
In other words, is open display of a concealed weapon 'brandishing' until you pull the trigger? Are you expected to keep your sidearms in your pocket until you actually fire? I think not.
As for the 'brandishing' bit, well, if you display your firearm with the obvious next intent of firing it if pressed, where is 'brandishing' superceded by 'legal use of lethal force to prevent bodily harm to oneself or another'? What the hell are you supposed to do, convince the bad guy you have a gun in your pocket and will take it out and shoot him unless he stands down? What's the point of having a gun in the first place, you could do that (or give it just a good a try) completely unarmed.