Our shop was in a rough neighborhood and shootings happened fairly often in the area. We had made a new prototype gun that was going to be used for trajectory computations that the big guns on the ships would be calibrated to. It used these big tracer rounds and we worked night shift... naturally we decided it was a great idea to test it out.
There were cops flooding the area in mere minutes and everyone was just chilling by their machines like nothing happened while the foreman talked to them. He just walked by everyone and said dont even think of stepping a toe outside until your shift is over.