Probot 2004

If you had to summarize drummer Dave Grohl's impact with only two words, they would be "grunge" and "alternative." Grohl played alongside the late Kurt Cobain in the grunge powerhouse Nirvana - whose impact was truly enormous - and he continued in a grunge-minded direction after forming the Foo Fighters in 1995. The word "metal," however, doesn't immediately come to mind when Grohl's '90s contributions are discussed; while Nirvana and the Foo Fighters both had metal influences, they weren't metal bands in the strict sense - they were more hard rock than metal. Of course, there has often been a fine line between metal and hard rock, which are closely related even though they aren't exactly the same - and given Grohl's fondness for metal, a straight-up metal project like Probot was long overdue…