I think that Warchild pegged it, pulling into a steep lot or driveway...which would likely involve a stop, perhaps even a gas station. Scrape, ignite, burn, trouble...
I remember as a yoot placing 1/2 full cans of Coleman white gas (cap firmly on) on a fence post with 3 lit votive candles on top...then shooting it from a safe(?) distance with a deer rifle. There's nothing like a good closed container explosion.
