Video: Londoners play a prank on tourists


As a stunt, the group Improv Everywhere recently brought folks to London's Trafalgar Square. On a secret cue at 3:30 p.m., all of the volunteers stood motionless in various poses.
This video shows the startled reaction of tourists and passersby:
You can learn how to participate, or create, similar events nationwide at ImprovEverywhere.com.