Yes, spontaneous combustion of fuel vapours have occurred at petrol stations around the world, with some documented cases in North America.
Correct, and caught on camera.
For anyone who missed an explanation - typically the victim is female and responds by pulling the nozzle out of the tank thus turning it into a flame thrower. The cellphone is involved since women generally leave them in a bag and head back into the car to get it.
So having rubbed against the upholstery in the car and failed to touch any metalwork on leaving, the phone user now returns to touch something metal ... the nozzle right at the vapour enshrouded fuel cap.
Whomph!
While you can't leave a fuel nozzle running in Oz anymore, the latches are removed for this reason, you still can elsewhere.