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Alexander Eric Vargas sits backstage before the first performance of the day. Vargas, who performs with the name Alejandro Dubois, has been entertaining since he was 13 years old. In the seasons he's not performing full time, Vargas teaches mixed martial arts to children.  At the Coney Island show, he performs fire acts, escape arts, sword swallowing, and often hosts the shows. Sarah Rogers/The Daily Beast