Durring science class one time... we were working with cooking up some chemicals. We had those little sterno cans.... I poured the liquid all over the desk, was one of those 6foot long desks made from slate rock or something.... and then light it up...

was a nice fire... teacher was so stoned he didn't care... the other kids thought it was cool. It only lasted for like 10 seconds and made the ceiling block a nice golden brown... but that was it. Never reported or anything. :thumbup: