What is the flash mob performance answer here

1, flash is "flash film" or "flash action" short, is the newly popular in the international open a hippie behavior, can be regarded as a short behavioral art.

2. Simply put: many people use the Internet or other means to do a series of designated songs, dances, or other behaviors at a designated place, at a clearly designated time, unexpectedly, and then quickly leave.

3, flash mob first originated in March 2000 in Manhattan, New York, USA. At that time, an organizer named Bill called more than 400 people, in New York Times Square, Toys R Us, pilgrimage to a mechanical dinosaur, 5 minutes after the crowd suddenly and quickly left, flash mob is therefore known.