This is a story that's been doing the rounds for decades. Not sure if everyone has heard it.
Bono addresses a crowd after showing a video about famine in Africa.
He starts clapping his hands slowly.
He says "We need to [clap] take famine in [clap] Africa seriously. [clap] Every time I clap [clap] my hands, a child in Africa dies [clap]"
An audience member says: "Stop clapping"