DETHKLOK's Brendan Small & ANTHRAX's Scott Ian Wrote The Soundtrack To A New Pinball Machine
If you ever see the pinball machine Black Knight: Sword Of Rage at an arcade, go play it. The music for the machine was written by both Anthrax guitarist Scott Ian and Dethklok creator Brendon Small, which also explains why it sounds like a galloping apocalypse. The pinball machine is also voiced by Ed Robertson of Barenaked Ladies, who were at one point signed by Metal Blade. So there's your connection to metal for that one.
You can grab your own Black Knight: Sword Of Rage for the small price of at least $6,000.