Songfacts®:

• This song with a music-box melody was the last track Imagine Dragons frontman Dan Reynolds composed for Smoke + Mirrors. It finds him singing about how he's been going too fast all his life like a freight train. "I wrote that song on Halloween night, when I went trick-or-treating with my little girl, and I had this melody that came into my head," Reynolds told The Illinois Entertainer. "And I was singing it to my little girl, and we'd just sing it back and forth because she loves music."
  
  "And I was in this place right then, when I was just starting therapy, and that's how I felt – my whole life, I haven't even had a minute to stop. I've just been like a freight train, just blazing through things," he added. "And I've gotten to this point now where I just can't do it anymore. I had to change something, because mentally, I'm just falling apart – I know everything about what Imagine Dragons is, but I have no idea who the hell I am. So that's kind of what that song is."