60 yrs. old with a replaced left knee (X2) and the right needs an overhall.The B.G is threating me . Don't know if he is armed but I know I can't win a foot race or a fight with a younger more agile person.They have one hand in their "Hoodie" and they are coming at me talking about my family heritage. I've got my hand on the 709 , what do I do??