“Improv Everywhere is a New York City-based prank collective that causes scenes of chaos and joy in public places. Created in 2001 by Charlie Todd, Improv Everywhere has executed over 100 missions involving tens of thousands of undercover agents” – Source: Improv Everywhere YouTube Channel.
Check out one of the groups recent videos: a musical breaks out at a technology conference.
So many social networking site . .. . .
Still Learning 
Reblogged this on Fong Tien's Blog and commented:
Improv Everywhere – Great posting from Education Portfolio. Have you checked your tweelings yet?