I heard Hepcat chortling at his desk. “What are you laughing about?” I asked. But he could hardly get a word out. Then he said, “Come over here,” but I was doing something on my computer. Finally he said, “It’s the top story on Boing, Boing.” He was still laughing.

And there I went. It’s a video of the latest prank by Improv Everywhere, a troupe that causes scenes in public places. You’ll love it if you’ve ever been to a Food Court. Especially one with Hot Dog on a Stick.

For our latest mission, 16 agents staged a spontaneous musical in the food court of a Los Angeles shopping mall. We used wireless microphones to amplify the vocal performances and mix them together with the music through the mall’s PA system. We filmed the mission with hidden cameras, mostly behind two-way mirrors. Apart from our performers, no one in the food court was aware of what was happening. Enjoy the video first and then go behind the scenes with our report below.