A contestant rocks out at Wednesday night's Air Guitar Championships tour date at the Bowery Ballroom in New York. Contestants are judged on three criteria: 1. Technical merit, or the ability of you to mimic guitar-playing ability. 2. Stage presence to move the crowd, and the key. And No. 3: "Airness," which is described as when "a performance transcends the imitation of a real guitar and becomes an art form in and of itself." Thursday's stop is at the Brooklyn Bowl.