When I was a kid, a few times we would go to the city dump. People dumped their trash there and there was always a few fires smoldering. We would look for aerosol cans, shave cream, paint, bug spray etc. After we had many of the cans, we would toss them in one of the fires and run like hell. After a minute or so, they started exploding. But we were 50 or more yards away.