Symbol of Authority?

We were driving up to school today and somebody was trying to drive through the gate at the bottom of the hill the school is on. Only they didn't have the right sticker on their car to go through that gate. They argued with the guard for a while as the queue of traffic built up on both sides of this one lane gate. People started papping their horns and signalling their impatience but this driver would not back down. Eventually, the guard reached above his tiny hut and grabbed his shotgun (I've no idea if it was even loaded!) and, in a very deliberate gesture, slung it round his neck while staring the driver down. The driver decides he's lost the battle and slowly reverses so the other cars can pass, while still attempting to negotiate with the guard about passing!!