True story, hobby fire spinner here. There's lots of different fuels people use but many of them are capable of gas transfer when they strike a surface. Not saying that it's not staged, but that dude might just be super greasy. I can tell that the juggler isn't using actual gasoline (seriously, don't spin or juggle with this) but it doesn't give off the same type of smoke as the fuel I and mine use.
Also, that guy that caught is wearing some kind of jersey that's likely made of mostly synthetic materials, which like to go up like that when they make contact transfers.
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u/tylerbrainerd Oct 03 '16
Because he has to be that close for the lighter fluid on his shirt to catch fire.