Folk metal has gained a lot of ground in the last few years, seeing the rise of bands like Korpiklaani, Turisas, and a host of other notable acts. In lieu of this, it can safely be said that the accordion is now in the realm of being considered a metal instrument. We know what you're thinking, "Accordions are metal? That's breaking the law!"

Here we have a video from 2011 of a young man playing the Judas Priest classic 'Breaking the Law' on his accordion. His mother can be seen entering the room from the left side of the screen with a confused look on her face. She probably thought forcing her son to take accordion lessons would get him out of his so-called "metal phase." So much for the golden future, eh mom.