Fallen Leaves by Billy Talent is a powerful rock anthem that deals with themes of addiction, loss, and self-destruction. The song portrays a stark narrative of someone who has fallen into the depths of substance abuse and the inevitable consequences that follow. The 'fallen leaves' metaphorically represent people who have lost their way, slipping into dangerous lifestyles that lead them astray. Key moments in the song highlight the struggle and the hopelessness felt by those battling addiction, as well as the impact it has on their lives and relationships.