That one guy/girl who could get a crowd to do anything...
person just finished an inspirational and moving speech, audience is stunned
Da One: Stands up and starts clapping.
People next to him start applauding too. The clapping spreads like a wave until eventually the whole room goes completely wild.
Da One randomly bursts out in song: Just a small town girl..
few other people: Living in a lonely world!
Whole classroom: SHE TOOK THE MIDNIGHT TRAIN GOING ANYYYWHEEERE