Improv Everywhere just posted its 6th MP3 Experiment where 2,000 people all got together and listened to the same instructional MP3. Once again they take the general populace by surprise and hilarity ensues.
View their other pranks, such as Frozen Grand Central and the No Pants Subway Ride at the links. Posted here as further proof that information sharing can be fun! Imagine what is going to happen when someone decides to harness this for problem solving or brainstorming!