You show me a gun and I'm not going to be pointing a holstered gun at you! You'll probably have a few holes already in you. Never threaten lethal force unless you are willing to use it! I am not saying that you "have" to use it. But you better be willing to! Showing a holstered firearm is pointless stupidity!
Reminds me of the time (this actually did happen) that I was getting some money at an ATM after I had a few too many pops. My car was blocking the lane so the next car couldn't get past me. Car #2 was honking his horn and yelling at the innocent woman: "Move your car your fat bitch."
I couldn't let him get away with that so I yelled back: "Who you calling a fat bitch a'hole?" His reply was "I ought to shoot you." Of course I replied go ahead; then he told me he had a gun - my reply was "who doesn't have a gun this day and age?" Turning to his friend in the car, he said: "Give me my gun; and "I bet mine's bigger than yours. I may have had a few rum and cokes but I was in for a penny, in for a pound. Now this is around 1983, near Cleveland. I removed the S&W Model 39-1 loaded with Speer Lawman 110 gr. JHP from the holster, snicked the safety off, and said: "Your's may be bigger then mine; that remains to be seen; but mine is pointed at your chest...."
Um he did not have a gun; his friend, in the car did not have a gun and exited the car stage right and kept on going...dude was closer to death that night than he probably ever realized it. Anything remotely resembling a firearm in his hands rising up to point at me I would have shot, more than once. I belonged to the Cuyahoga County Bullseye League back then; to 25 yards I was pretty darn accurate...
Today I can look back at it and admit to you all that I am damn lucky I didn't shoot him; had I - well I'd be starting my 35th year in the Ohio State Prison...
All of us already know to deescalate the situation, so acting like a tough guy isn't needed. Secondly no one should know you have a firearm if at all possible, again all of us know. The moment you NEED your firearm, the only thing they should see is the multiple muzzle flashes as you empty your magazine into their torso.
I hope to never draw my sidearm on a civilian in public, that's my dream. But if it's a no way out situation, my military training will become apparent to the criminal immediately. I think this looks staged, but if not they are lucky no one was killed.