How to "Bazinga" Your Attendees

I'm hopelessly smitten with the TV show The Big Bang Theory, so when I ran across this video, I just had to share:

I love the way it turned what has now become kind of hackneyed—the flash mob—and "bazinga"d the audience. The only thing I'd love more is to be sitting in a general session as the organization leaders drone on about whatever, only to have the crew and backstage people come out and join the leaders in pulling something like this...

Happy Friday, everyone!