Fuel Tanker Explodes When Man Uses Lighter To Check The Tank

An explosion in a Shell gas station in São Paulo, Brazil
"The explosion was caused by the fuel vapor accumulated in the roof of the station, which had destroyed the metal structure. Experts are investigating the source of the spark that led to the accident." - globo.com
It might have been a cellphone, or just static but looks like a lighter. He pulled something out and stuck it inside the tank.