#1 Draw weapon and cover the would-be mugger as I retreat to cover/ safety. Tell him that if I get shot at by anybody, he's dead.
#2 Draw and fire at Mr. Mexican Carry without comment or hesitation as soon as the weapon is presented and the threat is apparent. Do NOT wait for him to draw.
I am a Soldier. I fight where I'm told, and I win where I fight."
GEN George S. Patton, Jr.