That is funnier than shit!! I did that when I was 12 years old. Took a mortar and pestel and ground up potassium nitrate, charcoal and sulfur and put a small copper pot of it on my parents card table during their card game with the neighbors. Lit it and it made a column of fire like a rocket engine all the way up to the cieling and burned it up pretty good. Got my ass kicked for a month by my dad.