I am also a firefighter and understand the hazards of gasoline. Having said that, I saw the "gasoline-in-a-coke-can" trick this past weekend. It works well.. The vapors, being heavier than air do not "escape" rapidly from the open coke can, so when the can is "lit" the vapors do not go "whoosh" as you would expect from gasoline. The vapors burn slowly and for a surprisingly long time. The open can I saw burning this past weekend, with only couple of inches of fuel in the can, burned for over 10 minutes.. It worked very well... Now, having said that, just don't knock over the can

This "trick" works well.. but BE CAREFUL... no need to use large amounts of fuel... AND after a few beers, just stay away from gasoline, period.

my .02