Was taught by Detroit LE that the only time you draw your handgun is when you are under imminent deadly threat and that when you draw, you fire immdediately and quickly re-holster because you might get (mistakenly) shot by a uniform or off-duty LEO.
"...Cover. Draw. Cap the SOB." [Stressfire]
If there's time.
If I am in the perp's face when the perp pulls out his firearm, (as in the video) then must go Wyatt Earp mode instantaneously.
A difficult, challenging place to be
For 20 years the sea was my home, always recall the sun going down, and my trusty friend, a 1911 pistol, strapped to my side.