One of our FirefighterCloseCalls.com readers wrote:”I arrived at a reported auto accident where two vehicles were on fire and one of these was totally involved. It was very apparent that the occupants of the most involved vehicle were deceased and unsaveable. The fire crew immediately went to extricate the trapped and critically injured occupant of the second vehicle. I walked up to the scene and as I did, a massive explosion occurred sending the trunk lid of the first vehicle into the sky and sending all of us to the ground. The lid landed near the engine and right by the location of the engineer prior to his jumping onto his rig. The CULPRIT? The deceased in the vehicle had a large oxygen bottle in the trunk of the vehicle so he did not have to carry a small bottle all of the time. This only reminds us of the fact that there cannot only be oxygen but in many cases propane being transported in the rear of a vehicle. What do you do when you hear the high pitched whistle of a relief device? Maybe you won’t even hear it and then ? BE CAREFUL!