Probot played rock.
 "My Tortured Soul" was performed live on Headbangers' Ball in 2004, with Eric Wagner on lead vocals, Grohl on drums, Wino on lead guitar, Greg Anderson (of Goatsnake and Sunn O) on rhythm guitar, and Foo Fighters producer Nick Raskulinecz on bass guitar
 Grohl mentioned he and Sweeney had discussed and considered a lot of different singers, including the retired Jeff Becerra of Possessed, Chuck Billy from Testament, Pantera's Phil Anselmo, and the vocalists from Kreator, Destruction, Hirax and Candlemass

