I had a right one today. One of the trucks in the warehouse decided to catch fire. The Senior Supervisor decided to try and put it out with a CO2 extinguisher. With the rest of the shift looking on. So far, so good. Problem: The pin is held in place by a "breakable" plastic security cable tidy. No it ain't. Poor sod is trying to get this thing out. No chance. He simply cannot get enough purchase on this thing to break it. I took one look at this situation. Looked at him and said one word. "Fingers!" as get them out of the way or loose them. Drew my lock knife. Cut through the cable. Grabbed the extinguisher off him. 10 seconds later the fire is out. Moral of the story is: I carry a knife for a reason....