Seeing the positive response, Grohl brought Kasper and Sweeney back to do five more instrumental tracks and round out the project. According to Grohl, the songs sent to Eric Wagner and King Diamond had been previously done for Ozzy Osbourne as he was contacted to write for the then-upcoming "Down to Earth", but when Osbourne's label did not respond, he repurposed them for Probot. Then the demo tapes were sent to the singers, each of whom was asked to come up with lyrics, record them and then title the song. Cronos detailed he wrote three different versions so Grohl could choose one.