Improv Everywhere is a New York-based comedy troupe known for its unexpected flash mobs. For its latest mission, the group ...

Flowers, chocolates, handwritten cards — and flash mobs. People around the world expressed their love in myriad ways on Valentine's Day: hanging hundreds of paper hearts in the streets to honor a ...

One very popular example of a flash mob is the March 2009 video that featured over 200 participants in Antwerp, Belgium, Central train station who spontaneously broke into choreographed dance steps to ...