I carry hot. I have always treated every gun as loaded and hence have muzzle awareness. I never point the muzzle towards a place I don't want a nice little neat hole. Even in the event of a AD (which I have never had) it would not matter because I am aware where my weapon is pointing.
here is something I just can't visualize- how did the guy shoot himself in the upper thigh with a 7mm? I am assuming it is a rifle- right? imagine how the rifle had to be pointed to do that!