Sorry didn't mean -explosion- so literally. Guess what I should have said was; gas tank was ruptured, by what ever means, causinge dispensing and airation of the fuel. In which a ignition source, probly a spark from the impact, caused it to ignite. Quickly, I might add. I would be willing to wager the rupture of the tank and spark had noting to do with diff bolts tearing through the gas tank but the impact of the acident.