The Pyro Board Plays Some Hot Tunes...
(YouTube Link) This dangerous, yet beautifully mesmerizing, little device is called the Pyro Board-a table top full of flammable gas that makes flame patterns in a reaction to soundwaves that are directed at the board...
https://www.neatorama.com/2011/12/19/the-pyro-board-plays-some-hot-tunes/
