Ok - so say person isn't aimed at the cops but instead is aiming at someone else with a gun or both are aiming at each other; what do cops do, etc? Plus lets not pretend you have that much time to react/you are going to be quick on a trigger going into a situation where shots have been fired and you have no clue who is a good person vs. a bad one (I get it - people will likely drop that are good in those scenarios quicker and throw up there hands but everything is going to be rapid and will you even be listening to your surroundings when you are in a life / death situation). These are all reasons I know that me personally, could not have a gun for self defense (cause I have nowhere near the training and way more risk vs. benefit for me personally).