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Jimi Hendrix introduced himself the world in December 1966, when he turned "Hey Joe", a Los Angeles garage rock standard had been a hit for the Leaves, into a murder ballad with some wild guitar pyrotechnics. quickly followed it up with the self-composed "Purple Haze", a psychedelic stomper showcasing the devil's chords (the flatted fifths of the intro were known medieval times as the diabolus de musica and strictly interdict). As monumental and monolithic as "Purple Haze" , 51st Anniversary on the B-side is more nuanced and sassier. The song continues a theme already explored - albeit somewhat gracelessly - in Stone Free, about Hendrix's fear commitment.

Font: https://www.theguardian.com/musi/musicblog/2017/mar/15/jimi-hendrix-10-of-the-best