“The song’s been done a million different ways by different people, Aerosmith and such. I still play it in the blues band that I have with Rick Vito.But this one, for me, is really a reminder of the freedom we had in Fleetwood Mac, which was fantastic. I learned so much from the Peter Green period of the band.

“On this song, you hear structure, yes, but you also hear me being incredibly free to break into the shuffle at the end, which was not supposed to happen, but it did and we went, ‘Oh my God, we really like that.’ I really loved that because it was my way of participating in creating the character of the song.

“It incorporated the freedom to go off on a tangent, to jam – the classic ‘Do you jam, dude?’ We learned that as players. You hear that alive and well in the double-time structure that I put in at the end, which on stage could last half an hour. It was our way of being in The Grateful Dead.”