On my first day working at the gas station, I watched a senior co-worker measure the level of gasoline in the under-ground tanks by lowering a giant measuring stick down into them.
"What would happen if I threw a lit match into the hole?" I joked.
"It would go out," he replied very matter-of-factly.
"Really?" I asked, surprised to hear that. "Is there a lack of oxygen down there or some safety device that would extinguish it before the fumes ignited?"
"No," my co-worker continued. "The force from the explosion would blow out the match."