Mustage: also called “bart” in Norway.
In Norway it is mandatory for firefighter´s to have a mustage at all time. The reason that the firefighters in this little country has to do so, is that when the firefighters enters a burning house, and the flames get closer the mustage will start to burn. It will then come a distinct smell from the mustage that warns the firefighter, and they can get out of harms way.
This is an old and perfected method that has saved hundreds of daring and brave Norwegian firefighters from getting hurt or burned.