<P> The song is in the key G major . The main verse and riff follows a G--C--D chord progression . The lyrics borrow heavily from the Willie Dixon tune "You Shook Me". </P> <P> Two versions of the music video exist . The first version, directed by Eric Dionysius and Eric Mistler, is similar to the other Back in Black videos ("Back in Black", "Hells Bells", "What Do You Do For Money Honey", "Rock and Roll Ain't Noise Pollution" and "Let Me Put My Love Into You") and is available on the special Back in Black, The Videos . It is also included on the Backtracks box set . </P> <P> In the second version, directed by David Mallet and released six years after the song's original release, Angus and Malcolm Young follow Johnson around the English town of Huddersfield, with Angus Young wearing his signature schoolboy outfit . The video clip casts the English glamour model Corinne Russell, a former Hill's Angel and Page 3 Girl--along with other leather clad women wearing suits with zips at the groin region--pedaling bicycles like machines in the background . </P> <P> The VH1 series Pop - Up Video revealed that, during the scene with the mechanical bull, the woman playing Johnson's lover accidentally jabbed herself with her spur twice . The roadie who came to her aid married her a year later, and Angus Young gave them a mechanical bull for a wedding present as a joke . The original 1980 video features drummer Phil Rudd, while the 1986 video features drummer Simon Wright, who replaced Rudd in 1983 . Rudd returned to AC / DC in 1994 . </P>

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