 Doc Brown began his musical career in 2000 as a battle rapper, competing in live events such as the now defunct "Mudlumz", an infamously tough gig based at Dingwalls nightclub in Camden Lock where he battled among others before losing to fellow UK rapper Sway.Smith became a recurring battle champion at the fledgling competition "Jump Off" in 2003, when the now international event was housed underneath Yo!Sushi on Poland Street in London's Soho, moving to the Swiss Centre in Leicester Square.