The trio played publicly for the first time on July 17 at the Bon Air club—Presley still sporting his child-size guitar.[65] At the end of the month, they appeared at the Overton Park Shell, with Slim Whitman headlining. A combination of his strong response to rhythm and nervousness at playing before a large crowd led Presley to shake his legs as he performed: his wide-cut pants emphasized his movements, causing young women in the audience to start screaming