Just about what i'd do......In scenario A, I would continue facing him as I kept walking away, while at the same time shouting "Keep Away, Keep Away." I would look for a vehicle or something to provide some type of cover while doing all of this, and if I had the wife and kids with me, they would be ducked under the nearest cover I could find. If the man made any move towards his gun, I would draw and shout commands to drop his weapon, need help - - - try to get as much attention drawn my way as possible. And obviously, having the wife or anyone else nearby call 911 ASAP.
Scenario two, difficult to say 'exactly' what the right thing would be, but if I were confident he was not going to get a shot off, I would draw and fire until the threat was stopped. Call 911 afterwards and report that we were held at gunpoint by the bad guy.
Scenario A:Scenario A:
I would move draw and fire...movement should cause the BG to have to react giving you a momentary chance to unholster.Scenario B: