Flash mob (also known as flash; English: Flash mob is a group of people who meet at a designated time and place through the Internet or SMS, and then do some specific actions together (such as clapping their hands and shouting slogans). , are generally not illegal but very eye-catching actions), and then disappear in a short time as if nothing had happened.

This kind of behavior is called "flash action", which is also a kind of short-lived performance art, and there are smart monsters, flash mob and action gangs.

"flash mob" is a group of people gathered in a pre-agreed place and quickly dissolved after a short activity. Flash mob comes from two related terms. One is the flash crowd, which means that a group of people suddenly enter a website at the same time, usually in response to some activities or announcements; The other is smart mob, which refers to a group of like-minded people who use advanced technologies such as mobile phones, emails and websites to organize a gathering without leaders.

The Chinese name translates as "flash", which comes from Cantonese and Minnan. In Cantonese and Minnan, "flash" means to avoid and get out of the way.

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Flash mob first appeared in new york in 2000, and later spread to Europe and Asia.

Flash mob originated in March 2000 in Manhattan, new york, USA. At that time, an organizer named Bill gathered more than 400 people to worship a mechanical dinosaur in the Toys“R Us "in new york Times Square. Five minutes later, everyone suddenly left quickly, and flash mob became famous.

Flash mob is an urban fashion culture, and it is a kind joke that modern people play with the world when they are busy. Most of them said that they would take the initiative if the activities were designed reasonably. Of course, some people take a conservative attitude for fear of misunderstanding.