Breakdancers may give the impression that they are confident, perhaps even aggressive, but not B-boy C Plus. The Hongkonger is both humble and easy-going, despite his ability in a break battle. Also known as Sze Ka-yam, C Plus began breakdancing in 2009, taking part in competitions of various sizes before representing Hong Kong in the Olympic qualifiers last year. He placed 44th but failed to secure a spot at the Paris Games, which added breaking as a new sport to its programme. Quarter finals for the B-girls began on Friday, with the B-boys set to begin their medal battles on Saturday. Having…