What a story... glad that no one was injured. My heart goes out to that poor teller girl.
Today I went to pick my mother up from her place of employment (donut shop.) 30 minutes prior to my arrival, the cash/loan store right next door was robbed by two guys with black masks and guns. Nobody injured - mom was a bit shocked. Eight squad cars, a news van, and an ambulance for the loan clerk who nearly had a heart attack over it.
I was in Army special operations (airborne) for a couple years, and in general I feel fairly safe due to being trained in SOCP, LINE and such. But, sometimes I look around and wonder if having a weapon isn't a bad idea.