This is one of over 100 different missions Improv Everywhere has executed since 2001 in New York City. Others include the Frozen Grand Central, the Food Court Musical, and the famous No Pants Subway Ride, to name a few. Visit the website to see tons of photos and video of all of our work, including behind the scenes information on how this video was made.
For there latest mission, they staged a reenactment of the first Princess Leia / Darth Vader scene from Star Wars on a New York City subway car.
More info: http://www.improveverywhere.com
Behind the scenes: