I asked what was the liquid he put in his mouth. He told me it's called Fire Oil. (I am guessing it's the fuel for some camping gears.) The good thing about this fuel, according to him, is that it's not as volatile as kerosene and reduced the chance to burn himself. But the bad thing is that his mouth and face would be full of oil that he need to wash quite a bit afterward.
我問他噴出的液體是甚麼。他說是“火油”。我的理解就是露營燈點的燃料。他說火油的好處是不會搶火,不容易燒傷自己,但會滿口油。