Flexing: the 'bone-breaking' dance craze that bubbled up from Brooklyn
A shoulder twisted out of its socket? A back flip from the second floor of a building? Those are just the sort of show-stopping moves turning New York's latest street dance craze into an international sensationThe reflection in the mirror shows a wiry body tightly tensed, with a tattooed chest and hair tied up in two afro bunches. He lifts his shoulder and starts to twist it almost out of its socket, muscles knobblin…