An untitled hidden track follows "Poppa Was a Playa" and has Nas rapping from the perspective of his prenatal self. It was originally recorded for "I Am..." and had planned titles "Fetus" and "Belly Button Window". The track opens with solemn guitar chords and the sound of bubbling liquid before being overlaid with a beat and a piano riff. An introductory verse is delivered by Nas in a spoken word tone: "Yeah. I want all my niggas to come journey with me / My name is Nas, and the year is 1973 / The beginning of me / Therefore I can see / Through my belly button window / Who I am." The narrative follows the time before his birth, covering subject matter such as his parents fighting and his expectations for life. In "Book of Rhymes: The Poetics of Hip Hop" (2009), writer Adam Bradley denotes the track's lyrical narrative of an MC's story of birth as "one of the core narratives in rap", having its roots in a similar autobiographical convention found in African-American slave narratives. Of Nas' narrative, Bradley states, "By endowing the insensible with voice, he aspires to an expressive level that transcends speaking for oneself, or of oneself, to one that self-consciously constructs itself as an artist giving shape to that which lacks coherence."