If you don't know what a flash mob is, you should check out this video. If you do know what a flash mob is, you should enjoy this Happy Holidays Flash Mob from the Carlson School of Management of the University of Minnesota. Nothing to do with investments, but it is from a business school.
The video is about four and a half minutes long, but worth it. You should watch until at least the middle of the video when the security guard walks in.