building. >> with the fire out and everyone safe, one question remains. what sparked the fire? gasoline vapors are more flammable than liquid gas. fuel vapors are also heavier than air, so they sink. and on such a cool, breezeless night, the fumes stay where they fall and pile up. so conditions are perfect for what happens next. >> the occupant of the car got in out of his car several times, the car had cloth seats, the subject had hoodie tight clothing on, and we believe that it built up a static charge, and when he got back out of his car for the last time and reached for the nozzle to shut it off, the static charge he had built up in his body discharged and ignited the vapors. >> the lesson to be learned here is, next time you're at the pump on a cold, breezeless night, make sure to touch something metal before you touch the gas pump, especially if you have cloth seats. it will go a long way to