None the less it seems like a very irresponsible move.
No doubt. That guy was completely abusing his right to CCW... if he even had it to begin with.
It's great to hear that cooler heads prevailed, but I cant say that I would have had the restraint that your friend displayed in this situation.
I kind of chuckled to myself when I thought about putting myself in her shoes. I would have considered yelling "He's got a gun!!!!" or something to that effect. I totally think that his bluff would have been called, but it's impossible to say for sure.
There are too many nut jobs out there to accurately predict any one's actions.
People like that need to be put in their place. In a perfect world I would have put that D-bag on his a$$ and had him looking down the business end of his own weapon. He most definitely deserved it!