Scenario 1. At the point hes out of hte store hes no longer a threat to physical harm. You shoot him you go away. Once the contact is broken and he retreats you kinda are over a barrel. If that 20 dollar product is worth the 60 grand or so in legal fees to try to get off then have at it. It probably wont end well.
Scenario 2. If you are going for my gun in a car you are basically in my car. IF I have the ability to accelerate and Im not in park we are about to go for a serious ride. If I'm in park or boxed in and I can draw someone is getting ventilated. Its tough to say in each situation.
I say this every time it comes up. I never ever ever want to have to shoot someone and I never ever ever want to be put in the situation where I have to make that decision. I'm a much calmer and more mindful person if I'm carrying because I don't want to be int he situation where it can ever be said I escalated. i'm also hyper aware of situations going around me and have a really good sense of when shit is about to take a turn for the worst.
Its so tough to even try to interpret though because it happens so fast. One of the first things I remember someone teaching me when I started shooting matches is that you have to train at speed to get better at speed. The very first match I shot I had a target roughly 7 feet away that was one to the body and one to the head on the first target. I actually missed the head shot.
What isnt hard is to judge what happened. If anyone ever wants to see what its like to have that adrenaline flowing and how easy it is to misread something under speed and you are within a few hours of me just let me know. We will get you out for a match in the spring and you can see just how crazy the adrenaline flow is in a tense situation.