Improv Everywhere causes scenes of chaos and joy in public places. Created in August of 2001 by Charlie Todd, Improv Everywhere has executed over 70 missions involving thousands of undercover agents. The group is based in New York City and best known recently for the ‘Frozen Grand Central’.

Their latest mission involved filling a subway car with identical twins, creating a human mirror. Genius.

Thanks to Aaron for the link
www.improveverywhere.com