Chinja! Mugabe Must GO! was what the crowd was chanting with some people waving Banners with “Mugabe and Gono Must Go”. People in various forums saw it as an embarrassing move by Zimbabweans in the UK but it may just have been them getting their point across that Mugabe must go before they consider returning home.
Tsvangirai clearly looked lost for words when he saw that he had no control over the crowd. There was nothing else he could do but step down from the pulpit.