Earthshaker was a loud, crunching instrumental, influenced by Chuck Berry (and somewhat reminiscent of his Guitar Boogie), with no overdubs, just Blackmore and company ripping through a minute and 40 seconds of basic rock & roll licks. Satan's Holiday was a high-wattage adaptation of Grieg's In the Hall of the Mountain King, a tune that stayed in Blackmore's stage repertory right into the '90s. The guitarist's clean yet sharp and powerful playing of the melody is a marvel of rock & roll virtuosity, while Underwood's drumming, coupling Charlie Watts-type steadiness with little Jim McCarty-style flourishes, is the other notable attribute. The group, which never really existed, never released another record, and within a year of its release, Blackmore was playing in an outfit called Roundabout alongside organist Jon Lord and on his way to making the music he liked. ~ Bruce Eder, Rovi