The shared experience of absurdity

TED Talks Charlie Todd of Improv Everywhere causes bizarre, hilarious, and unexpected public scenes: Seventy synchronized dancers in storefront windows, "ghostbusters" running through the New York Public Library, and the annual no-pants subway ride.
http://www.ted.com/talks/charlie_todd_the_shared_experience_of_absurdity.html

The Mute Button

Another Improv Everywhere
http://www.youtube.com/watch?v=4BZi1wN6Nbc&feature=youtu.be

Improv Everywhere

Improv Everywhere is a New York City-based prank collective that causes scenes of chaos and joy in public places. Created in August of 2001 by Charlie Todd, Improv Everywhere has executed over 100 missions involving tens of thousands of undercover agents.
http://improveverywhere.com/2009/02/09/high-five-escalator/