For at least 18 years, I have been ending my science shows with the Whoosh Bottle demonstration. It is one of the most dramatic and visually impressive demonstrations that I have in my set list. The demonstration itself is pretty easy. A small amount of a volatile liquid is poured into a 5 gallon jug and shaken vigorously. The liquid is poured out and the vapor gets ignited with a BBQ lighter. (more…)