Big Sean visited Philadelphia radio station Power 99 where he delivered a freestyle on Cosmic Kev’s “Da Come Up Show.” The D-Town MC went off top his dome, spitting rhymes such as,

“Teacher told me get a job, save up for 401(k)/ I’d rather be young as hell counting 401K.”

Listen closely as the G.O.O.D. Music signee, who will release his Finally Famous debut in June, raps for three minutes after 30 hours of no sleep.

Download: Big Sean Freestyle