Showrunner Chris Bailey says the Guns N’ Roses frontman quickly agreed to guest-star on the Boomerang series after his story editor suggested the idea. "What was so fun about it is that I’m a morning person," says Bailey. "I just do my best work before noon. We booked a recording studio and were told, 'He likes to work at 1 a.m.' I was like, 'What?” And there was indeed a request that he do it at midnight or 11 p.m. I was like, “I’m going to be wrecked by then.' We compromised and did it at 9 p.m." Bailey adds: "He came in under the radar and was like, 'Hey.' I remember walking to my car at the end and he was driving away in his truck. He came in like the wind, did his job, was magnanimous with everybody, and then he was gone. It was like Batman. You turn around and it’s like, 'Hey, where did he go?'"