spooky business that, flash mobs
but you maybe have not seen video of how 'flash mobs' respond to muzzle flash
And if they do not dissipate in a flash even quicker than they appeared in a flash,
well good luck in you-vs-40 crowded into the confines of a quickie stop mart, now matter how many spare speed loaders/strips you carry (much less loose rounds in a belt pouch). If six doesn't get it done in such a CQC scenario, speed reloads won't even be an option... and if six does get it done, you best pray at least six of them really were wielding deadly weapons.. even LEOs are not permitted to just randomly shoot down people in unruly mobs, tempting as it may well be. Shots fired is always your option of last resort. Very tough call that, and one of the many reasons I do not envy our LEOs their many obligations.
PS
for as much as we hate to see No Guns Allowed signs on bank lobby doors, it is very easy to understand why they do not put armed security guards on duty in those lobbies anymore. Once shots are fired, it gets bloody awful in a flash, and bad actors are not the only ones who bleed.