I don't know that it is possible with gasoline, but with the stuff our military uses for its vehicles it is.

Friend of mine was filling up his M113 while smoking, despite warnings to put it out. Lit a flash fireball in the air around him and we all laughed at his singed eyebrows.

For references, M113 is an armored personnel carrier that can be converted to a four litter ambulance. You stand on top of it to fuel up.

Sportsmanship killed CF