Disposing of old gasoline?

When I was growing up my neighbor used to light the charcoal in his BBQ using a baby food jar amount of gas. He'd pour it over the charcoal, let it sit about 30 seconds, then stand back and throw a match to it! Man, you could be in the house next door and hear the 'whump' sound when that lit off.

Hope you didn't eat too many burgers off THAT grill ...