Chance the Rapper’s new Acid Rap mixtape is a stone-cold SPIN Essential delivered by one of our Real Hottest MCs in the Game. It’s full of brash moments, brainy moments, jam-packed moments, and even the occasional minimal moment, as evidenced by the second half of “Pusha Man.” Now we know that the cool calm latter portion of that song has a name of its own, “Paranoia,” and that it was produced by Los Angeles beat artist (and Toro y Moi collaborator) Nosaj Thing. The video above, filmed for Yours Truly’s “Songs From Scratch” series, captures the humble beginnings of that very track — Chance and Nosaj together in L.A.’s Ironworx Studio, experimenting with ideas until they get it right. The former talks a little bit about his process, the latter schools us on his history. And though the song won’t be available as a standalone download until May 7 (via Yours Truly), you should go ahead and download Acid Rap anyhow. For more collaborative magic, take a gander as “Songs From Scratch” sessions featuring Jeremih with Shlohmo, Angel Haze with Lunice, and Danny Brown with AraabMUZIK.