Established in 1800s when William Palmer, a serial killer, was about to be hung he looked at the trap door of the gallows and said, "Are you sure it's safe?" Riding on a wave of dark humor alleviates the stress and trauma that a Firefighter faces but, at home or the outside world, it can become offensive to the ones who never put on bunker gear. Conversate with your spouse, communicate the differences, and empathize the feelings.