My understanding on this is limited, being a fire virgin and all. As far as my understanding stretches the idea is to use a low flashpoint fuel such as ethanol, or any short chain alcohol really, and to ignite it before it evaporates. The only experience i have of this is using deodarant as a fuel (contains alcohol as a propellant)and then setting fire to it. It is a dangerous practice so expect to get burnt at least a little, also expect singed arm hair (smells like mushrooms) or any other hair for that matter. And last warning is to watch for any running of the fuel, i have a scar on the underside of my arm where the fuel flowed from the topside of my arm down and ignited.
PB
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fire is alive. it lives and breathes. it consumes and destroys. but we control it and live with it, we are fire dancers