There's comedy group in New York called Improv Everywhere that does a bunch of flash-mob videos for YouTube.  And their newest one is pretty funny. They went to a miniature golf course in New York City and surprised a bunch of kids by bringing caddies, a scoreboard, commentators, and a huge crowd of people.  At the end of it a kid sinks a putt, and the crowd acts like he won the U.S. Open.