This unlikely collaboration between American electronic music producer Skrillex and the surviving members of legendary late '60s rock group The Doors was created for the Re: Generation music documentary, which recruited five popular DJs/producers to record with artists from five separate genres. Doors keyboardist Ray Manzarek told Rolling Stone that he and Skrillex had an immediate musical connection. "[Sonny] plays his beat, all he had to do was play the one thing. I listened to it and I said, 'Holy s--t, that's strong,'" he said. "Basically, it's a variation on 'Milestones,' by Miles Davis, and if I do say so myself, sounds f---ing great, hot as hell."