You are standing on a stage and you suddenly lose your voice. You can say nothing. Then you hear a slight rumble. It is the audience starting to speak louder and louder. You start to speak again but nobody is listening to you. Everyone is talking in a deafening, rhythmic jumble while you mouth words. And yet afterwards someone comes up to you, asks for your autograph and says that it is the most enjoyable performance by anyone he has ever attended.