A group of teens throw a surprise sweet sixteen birthday party on a subway car, with the help of random passengers. Inspired by the return of My Super Sweet 16 on MTV. | Improv Everywhere

A mysterious and magical mail slot gives random New Yorkers the chance to instantly deliver a Hallmark card and light up someone’s holiday. | Improv Everywhere

Great story on Improv Everywhere from CBS New York. "For more than 20 years, Improv Everywhere has been turning New York City into a playground for positive pranks. Improv Everywhere reminds us while we are all leading millions of different lives, our unique connection to our outside spaces gives us a chance at a shared experience. It’s a reminder that playing like a child can be liberating. All we need is someone to give us the OK." | Improv Everywhere

We placed a 10-foot tall boombox on Pier 17 in Manhattan and waited for unsuspecting people to plug it in. Watch what happens in this year's holiday video! | Improv Everywhere