Avgas and jet fuel aren't the same thing. Avgas is leaded gasoline used in airplane engines. Jet fuel is specially formulated for use in turbines.

And... Is this post about 9/11?

I thought Avgas was 100ll, not jet fuel?

Once years ago, I used a few mL of gasoline as a solvent to clean grease from a part. To dispose of it, I put it in a can and tossed a lit match in.

The liquid gasoline extinguished the flame. Even gasoline is hard to ignite.