Similar thing happened to me and a good friend when we were little. We went outside and burnt some nailpolish by pouring it in little cups around town. One fire got a bit too big for our liking and my friend decided to stomp it out. Bad idea as his shoe started to burn and he looked like he was straight out of an Ong-Bak scene, flailing his flaming foot around. After taking his shoe off and smashing it on the ground a few more times he managed to save his shoe. Problem was the initial fire was still going and even getting bigger. Maybe it was the little workout he had just before or the panic, but he quickly thought of the next best way of putting it out was by simply taking a piss on it. Worked out perfectly fine.