Best I ever did was light a Nissan Maxima on fire. I don't know if you guys know the Rx-7s reputation for blowing fireballs but just before a fireball pops out, the car releases a cloud of gasoline vapors. The guy was riding my ass on his cell phone and I was trying to pop just a tiny fireball but his car caught all the vapors and.. umm for about 2/3 of a second he was on fire before the highway wind blew him out.

It was something like this only on the front of a Maxima.

http://www.youtube.com/watch?v=raozVznET40