Off topic as the star of this story is methane gas not gasoline.
Once, many years ago, there was a giant explosion out by our very small local airport. Multiple people reported that a plane had crashed but nothing was confirmed and it quickly fell out of the news.
A month or so later, an elderly friend was telling me about how all her windows were shattered one night (right timing) and she was pretty sure her neighbor had done it. Her story was that this neighbor, when a cow died, threw it into a big pit. (It cost money to have them legally hauled away to the tallow company.)
Anyway, many cows later, this neighbor somehow sparked his dead cow pit full of rotting dead cows and methane gas. I wish I'd been there...