The Sound of Hands Clapping
At a concert in Israel, Bono, U2's lead singer, asks the audience for some quiet. Then he starts to slowly clap his hands. Holding the audience in total silence, he says into the microphone, "I want you to think about something. Every time I clap my hands, a child in Africa dies."
A voice from the front of the audience yells out..."Nu -- so stop clapping."