One of my customers was a armoured car company. I used to go into their "sorting area" literally with a armed guard watching and following me as I worked on some of their out sourced equipment. I joked with one of them that if the fire alarm went off that I would likely be the one following, and was sternly told that if any alarms went off to just stop and follow his directions. Fun work environment, they even had a firing range on site as these guys had to have a qualifying target test every few years.
Stopped joking around...