While I was in the military I heard a myth about some fuels guys who overfilled a bulk storage tank and when thy went to get back in their truck to leave the fuel under the truck ignited from them starting it.

Question:
Is this a true story?

Choices:
Yes
But they were using JP8

 

It could be possible if there was enough fuel on the ground, and it was hot enough for the fuel to have reached its flash point, and the truck was sitting for long enough for the fuel vapour to have reached the engine bay, then it is possible that when they started the truck it could have ignited the fuel on the ground which could ignite the bulk of fuel.