Stop in for a cup of coffee

I’m actually a bit surprised it didn’t ignite the gas in the line and travel back to the tank where a fresh 15 gallons of 93 octane was
Liquid gasoline doesn't really ignite.
Its the vapor, plus the heat, plus the O2.

Sure if the liquid in the tube vaporized and enough oxygen got in, then it would light.

Waht was in the extinguisher? Dry Chem, CO, or Halogen?