A lot of humor is based upon our fears. Perhaps you subconsciously fear a possible car fire? Carry a good fire-extinguisher ... a large one. CO-2 works well on most car fires. I always have one withing easy reach, mostly in case of a fire at a gas pump.
I've never understood why car manufacturers don't build a CO-2 system into their cars. Wouldn't add more than a few bucks to the total cost.