text: A non-lethal suggestion?
  I have spare, cheap emergency cellphones I started carrying and car-charging a couple of years ago. Either will immediately dial 911 at no cost. 
  One is always in the car and the other is canceled with me in case I midplace my normal phone. 
  Safer than trying to shoot an armed thug and enables a fast police response - if you can do it safely, try to if the perps vehicle