From Charlie Todd of Improv Everywhere:
Over 2,000 people press play at the same time on the same Mp3 and have an epic balloon battle in cities across North America. The Mp3 is a mix of original music and instructions from a voice. Participants were told to wear a red, blue, green, or yellow shirt and bring a balloon. After a series of activities, the experiment came to an end with a giant battle. Everyone was split into two teams and instructed to blow up their balloons and engage in battle. This trailer video shows footage from all 4 stops on the tour. Visit our website to see many more videos and photos. Thanks to Yahoo! for embracing our mission and making this tour possible.
Edited by Matt Adams. All music by Tyler Walker.
Check out the reports for each city and more videos and photos.