“It was one of those riffs that we had laying around for a while. Actually, I think it went back to when I started working with Mike Byrne in 2009. The original riff was called ‘Nero Riff-O.’ So it sat around for a long time, and I was finally able to turn it into a song.

“It's a little bit of what I used to do, even in terms of process. The way I wrote when I first got into rock was, I’d write these crazy riffs and time signatures, and then I’d sit there and think, OK, what the hell am I going to sing over this? It was a way of working backwards.

“With a song like this, I know we were using a combination of a Marshall Super Tremolo amp with four rhythm guitars, and the other guitars went through a Reeves Custom Jimmy head, which is the re-creation of Jimmy Page’s Led Zeppelin I amp. It’s incredible.”