I was in Burger King a few years back. An irrate customer was complaining that he wanted another tomato on his burger. The clerk told him no, you only get one tomato. Long story short.....The customer become so irrate, that he attempted to jump over the counterto go after tghe clerk. I was able to grab him by the scuff of the bck of the shirt and jack him up against the wall until the police arrived.
I never actually drew down on him, but it was definitely re assureing to know I had it!! Weather it actually saved my life or not....probably not directly.