Clapping the rhythm of the "challenge" part can be very effective in getting the attention of a group of distracted people that you want to address. It’s so wel

Clapping the rhythm of the "challenge" part can be very effective in getting the attention of a group of distracted people that you want to address. It’s so well known that almost anyone instinctually claps the response when they hear the challenge. As a sharp percussive sound, clapping is also readily audible over chatter.