From my friend that saw it more times that I did in 2009:
"There was a flaming fish and there was like 7 things that shot fire it was all made of metal i was practically sitting on a propane tank i think it was a calliope thing
they moved them around because i remember walking past there other nights and they were set up diferently"
When he says he was sitting on a propane tank, he means that quite literally. Inside the circle of spires that the fire jetted out of, where the group of people sat while the fire went on above them, there was a propane tank sitting there. Assuming it was hooked up to all of them?
God Please, don't make me make myself look like a moron...