umm was it from his “special glass”? throwing back them double vodka redbulls??? if thats not the case…. all sugar burns or anything else with calories in it so redbull must have a high calorie/liquid ratio enough that it is flammable

Red bull won’t burn.

Did you actually taste the liquid that your instructor set on fire? If you didn’t, you can’t claim that you know for certain that it was, indeed, red bull that was burning.

Try it yourself; get some red bull and try to set it on fire. It won’t work.

I don’t know what made you think that this burning liquid was red bull, but it wasn’t, i can tell you that much: there’s absolutely nothing flammable in red bull drinks.

Here’s the ingredients:
http://en.wikipedia.org/wiki/Red_bull#Ingredients