I always make it a rule to let the other fellow fire first.  If a man wants to fight, I argue the question with him and try to show him how foolish it would be.  If he can't be dissuaded, why then the fun begins but I always let him have first crack.  Then when I fire, you see, I have the verdict of self-defence on my side.  I know that he is pretty certain in his hurry, to miss.  I never do.