Young Thug's pretzel-like flow and slippery rhymes are rooted in hip-hop's long tradition of boundary-breaking MCs. Lil Wayne's knotty, full-throttled raps, delivered atop the boiling-over samples on "Let the Beat Build," offer precedent for the Thug's own gravity-defying melodic vocal runs, while the stoned whimsy of Gucci Mane's "Pillz" provides context for Thugger's unpredictable and seemingly spontaneous rhymes.