In Mick Wall's biography of Iron Maiden entitled "Run to the Hills", founder Steve Harris recalls: "I distinctly remember trying to play along to Black Sabbath's "Paranoid" – at first I just could not get it. I threw the guitar on my bed and walked out in a huff, but the next day I came back, picked it up and played it all the way through note-for-note! Once I got going, I started getting into bass-lines with a bit more subtlety to them...".