"The song was written by vocalist Sean Harris and guitarist Brian Tatler and released on Happy Face Records, a label owned by the producer Muff Murfin of The Old Smithy studio of Worcester.The song was immediately popular among the heavy metal circles in the United Kingdom around the time of its release, but only rose to international prominence after Metallica covered it as a B-side on their "Creeping Death" single in 1984; the cover was re-released on their 1998 covers album "Garage Inc.".