“Realistically, the guys in Metallica can shit out riffs all day, and half of them will be incredible. When you hang out with them, though, you start to hear the difference between a great riff and a Smoke On The Water-type riff. Metallica had several on this album, and I’d say this one is pretty high up there.

“So we started out with a great riff, and then it became my job to help them carry that as a theme throughout the song. There had to be a movement to the parts. Like on other tracks, the big moment in Wherever I May Roam came about when the lyrics were finished. At that point, everything made sense and came together.

“I wish I could take credit for the sitar, but it was the band’s idea. I thought it worked beautifully – a great element to a great song.”

Listen: Wherever I May Roam