In this video we watch a demo of The Last Gun, a flute-like instrument that features a shotgun as its main body, using compressed air to send mechanical parts to trigger musical notes.
Constantine Zlatev, the creator The Last Gun, explains:
The mechanics are controlled via the use of open-source electronics using an Arduino microprocessor and the data visualization is accomplished through a Raspberry Pi board. […] It is programmed to play a somber melody for every rise in arms exports and an upbeat tune for every year the arms exports drop.
Wow. So not only is this instrument comprised of a frickin’ shotgun, but it uses an algorithm to calculate the rise and fall of arms exports over the past five decades in the US. You can go here to learn more about this project.