While I think about it, here is the magic secret to self defense when the other person has a firearm:  place a solid brick wall (or the equivalent) between you and the person and run like Hell!  There is no better way to stay alive.  And even then, some high powered rifles can actually shoot through a brick wall.  Not many, but some.

So, if I ever talk about “self defense” against a gun, realize that there is only 1 guaranteed way to survive the experience:  run like hell!  All  other ways may increase the odds but …  This is NOT a movie and all other ways may be better than making a target of yourself but that’s all.