There are no exceptions to Rule #1

Rule #1 of gunfighting: Don't bring a knife to a gunfight.

This guy apparently didn't receive that memo. And yes, this incident actually took place in Massachusetts. Violent crime prevented by the use of a legally owned firearm, and not one shot fired or one person injured by the evil gun. Whadda you know?

"After the attendant made change the second time the suspect produced a knife and pointed it at the attendant and said, 'Don't do anything stupid and give me all the money,'" Nally said. "About this time the attendant produced a handgun which he is lawfully licensed to do and ordered the suspect to leave the store, which he did."

Now, is this guy in any position to determine what constitutes a stupid activity? You think he'll smarten up enough to consider a new line of work?