“That song has so much voodoo in it. It sounded like it was written under a full moon. It gets straight to the darkest parts of one’s psyche”: Kirk Hammett on the Fleetwood Mac classic that defines heavy music

Kirk Hammett plays a Jackson Rhoads [left]; Peter Green with the Les Paul that Hammett would eventually own.

There are all kinds of things that make a song heavy but it’s never just about high-gain electric guitar, tuning down and turning up. If it was then it would be easy. And heavy music doesn’t come easy.

Kirk Hammett knows this. Metallica has had their share of heavy tracks. The Thing That Should Not Be and Harvester Of Sorrow are front-to-back heavy. Sad But True perfects the art of heaviness in box-office stadium metal.