Do you know what Fall Out Boy's new song, "This ain't a scene, it's an arms race" means?

i absolutly LOVE that song...I've watched the music vid way to many times and i think it might b how they got started but then pete falls out a window and dies and comes back alive cuz it was all a dream then im like ok and what is this about... not very many rock songs make sence these days...o well i still love them.