I just read about the group Improv Everywhere in David Pogue's NY Times blog. According to Improv Everywhere's website,
Improv Everywhere causes scenes of chaos and joy in public places. Created in August of 2001 by Charlie Todd, Improv Everywhere has executed over 80 missions involving thousands of undercover agents. The group is based in New York City.
They have a whole series of videos of their "missions" on the website, one of my favorites is High Five Escalator which is embedded above. It's so wonderful to see the diversity of New York riding up the escalator together, and, yes, high fiving Rob.
We'll try to participate in No Pants Subway Ride in Vienna next year. Contact me if you're interested.