On January 29th, 1967, Jack Bruce came reeling out of Jimi Hendrix’s show at the Saville Theatre in Covent Garden, went home and channelled his shell shock into – arguably – the defining riff of the Sixties, and the song that arguably created the template for heavy metal.
“I don’t think Jack had really taken him in before,” Cream bandmate Eric Clapton told Rolling Stone. “After the gig, he came up with the riff. It was strictly a dedication to Jimi.”