Tim Hansel in his book Holy Sweat tells a story about Jimmy Durante, one of the great entertainers of a generation ago.
Durante was asked to be a part of a show for World War II veterans. He told them his schedule was very busy and he could afford only a few minutes, but if they wouldn’t mind his doing one short monologue and immediately leaving for his next appointment, he would come. Of course, the show’s director agreed happily. But when Jimmy got on stage, something interesting happened.