This week we’re discussing the one and only album by Dave Grohl’s Probot. The band was a passion project by Grohl and was made to quench his thirst for metal. Every track has a different, legendary guest vocalist. Lemmy, King Diamond, Max Cavalera, Cronos, and Wino are only a few of the heavy hitters we have on this album. Even Jack Black makes an appearance. If you’re a fan of metal, this one is a must.