Pyrophone
The pyrophone is another wonderfully strange organ. It’s also known as the fire organ or the explosion organ. For a good reason, too, because it literally explodes. The organ is powered by gasoline and propane; so the sound is produced by combustion and explosion.
Source: Pyrophone Juggernaut
In order for this musical instrument to be played, at least some portion of the organ needs to be on fire. Talk about a rock and roll show! Pyrophones date back as far as the 19th century.