premise: The profundity of an artist such as we won't see again for some time (Sarah Kaufman, the Washington Post ). Critics forgive his use of goofy gimmicks--he improvises a dance to his own heartbeat, which is amplified by a device affixed to his chest--focusing instead on the credibility he has given modern dance, having switched from classical ballet in midcareer.
hypothesis: The artist switched from classical ballet to get into modern dance.