Frozen crowd at Grand Central

I have always liked the wittiness of Imrov Everywhere:

On a cold Saturday in New York City, the world’s largest train station came to a sudden halt. Over 200 Improv Everywhere Agents froze in place at the exact same second for five minutes in the Main Concourse of Grand Central Station. Over 500,000 people rush through Grand Central every day, but today, things slowed down just a bit as commuters and tourists alike stopped to notice what was happening around them. Enjoy the video first and then go behind the scenes with our mission report and photos.

I especially like the time-lapse moments in the video.

Better quality video at the Improv Everywhere site