Those who perform know the sweetest sound they can hear is the applause or laughter from an audience. It is the  ultimate payoff for doing a job well.

Here is magician David Blaine doing a little one on one magic. His audience, a single young man who appears to be a bit skeptical. After David pulls an amazing sleight of hand trick right before the  young man's eyes the reaction is priceless.

Actually it is a typical teenager type reaction. You could give them a million dollars and they would still leave you hanging.