Wow. When it happens it happens fast.
I had to go to the VA today and when finished stopped at a Cafeteria. I walked down a hallway past a scumbucket, another couple also older, (me 64), also came in. I paid, went to a table to put my hat down (US ARMY RET) and went to the food bar nearest the register.
Suddenly the Senorita at the register screamed "Robbery", she had the guts to slam the register closed. I pulled my Sig 229 and pointed it at a fellow holding a knife. The girl took the opportunity to run, screaming bloody murder in Spanish. A few seconds later a half dozen 'compadres' some wearing cooking hats chased after the guy. I got a plate and sat down to eat.
A fellow and his wife came up and he said he also had a CCW and was preparing to back me up The police came and thanked us and explained to the owner that they simply can't be there all the time. At leas a half dozen others came to me and the other CCW holder and explained that they had intended to get their CCWs but didn't think anything would really ever happen.
This is the second time in 5 years I've drawn my gun and I'll tell you when it happens it is fast. And I mean fast. I carry a 229 in a Wild Bills No Such Agency and it is very fast.