RadioBDC thought it would be pretty cool to have some local street musicians entertain the crowd while headliners The Sheila Divine set up the stage to bring home the first-ever Live on the Square free concert at Somerville’s Union Square last Sunday. Pretty cool was an understatement, as didgeridoo player Max Jackson and beat boxer Gene Shinozaki took an unexpecting crowd by storm. Check out a clip from the duo’s 15-minute set.