Randy had the basic riff, the signature riff. Then we worked on music together. He needed something to solo on so I came up with a chord pattern and the section for him to solo over.

Before it was called “Crazy Train,” before we even had a title, Randy and I were working on the music. He had his effects pedals, and coming through his amp was a weird kind of chugging sound. It was a phase-y kind of psychedelic effect, this chugging sound that was coming through his amp from his effects pedal.

Randy was into trains—he used to collect model trains and so did I. I’ve always been a train buff and so was Randy. So I said, ‘Randy, that sounds like a train. But it sounds nuts.’ And I said, ‘A crazy train.’

Well, that’s when the title first was born. And then Ozzy was singing melodies and he was phrasing exactly how it ended up. And I started writing lyrics to it.