A trapezist who plunged three stories into the audience at a Philadelphia circus performance Saturday night is expected to make a full recovery. The performer, Chenglong Wu, 19, remained hospitalized in stable condition on Sunday. Wu was performing a 4 p.m. show for the UniverSoul Circus near the Mann Center for the Performing Arts in West Philadelphia’s Parkside section when his high-flying stunt went awry. Wu’s act includes midair flips and jumps, video posted to the circus’ website shows. Witnesses posting to social media Saturday said Wu fell 30 feet into a safety net after a partner failed to catch him during a stunt.