Probot was a heavy metal recording project led by American musician Dave Grohl, as a side project from his primary group Foo Fighters. The album was released in February 2004. Described by Grohl as "a death metal Supernatural", the album mixes instrumentals recorded mainly by Grohl along with various metal singers he admired. The album featured two singles: "Centuries of Sin" backed with "The Emerald Law", and "Shake Your Blood". A music video was released for the latter. Critical reception... [more on Wikipedia]