Meh not really because the simple threat of violence is never enough and if you willingly showed it might as well have pulled it and shot someone.  When someone flashes a firearm it is just saying I dare you to which often they will. And without reasonable cause to kill them (court of law justified) then it makes all the others look bad. Looks to me like he was provoked and had three on him which honestly being in his shoes I would have drawn down on them and not hesitated as I felt in danger for my life and those lives around me officer. Takes someone to make a stand and escalation of force is all these monkeys understand and when another came at me yeah I would have plugged them too.