I wish I had been there. This is possibly one of the most astounding (visually at least) stunts ever pulled. No exaggeration--just watch the video.
Over 200 New Yorkers recently walked into one of the busiest train stations in the world, New York's Grand Central Station, and at exactly 2:30 pm, all froze in place. There's one guy in the video who froze just as he was stooping down to pick up some scattered papers. Talk about commitment.
Best prank ever: Stopping time at Grand Central Station - Gadling