That is very, VERY unlikey, and not worth pulling a weapon over. It's also why I suggested hand to hand training, and also why relying on a gun as a "defensive tool" is ridiculous. You can only attack, not block, with a gun. Rifles aside.
In my younger days, I have witnessed more than a few barfights that ended with one punch - enough to convince me that I have no intention of testing the odds. As a senior citizen, hand-to-hand combat is not one of my better options. If someone has chosen his fists as his primary weapon with which to attack me, I will assume that he is very proficient and respond with the weapon with which I consider myself to be proficient - especially when the welfare of any member of my family is also involved.