Ultimate deep purple song...everything what was available as hard/heavy rock flows into this song... based on a song bombay calling, deep purple slowed the song down in the beginning... going into the 3 times build up vs the bridge" machine gun" than the solo, the marvellous guitarplaying of blackmore... the end of it is an arpeggios between him and lord, stopping and to build up again... vs the end climax were all the members of mark 2 turn it to full volume. The endshot is an delayed overwork... vs everything the use does times, hammond, e guitar, marshall, drums and a thundering bass, its a masterpiece were gillan laid his soft falsetto and heavy distorted vibrato on it. No screaming...its sung in an octave above the normal falsetto.... not many could reach this high notes in the early 70s. This piece of music was an eye-opener for serval heavy metal bands... gillan, glover, paice, lord and blackmore were the ultimate hard/heavy rock early pro metal band...no body played vs that aggression, dynamic, or good loud force except for sabbath and zeppelin. So its easy to listen... an heavy song to play... thanks for that Mark 2 line up