The phenomenon of the flash mob — masses of people organized using social media — began innocently enough and quickly mushroomed. Among the highlights in recent years: One hundred people danced to ...

Every once in a while, crowded train stations have been known to break into song and dance and then disperse as if nothing happened. Large groups of people freeze for a period of time and then ...

This is the second summer in which “flash mobs” are sweeping big cities throughout the United States. If you haven’t heard of flash mobs or know what they are, it can only be hoped that the rock ...

They're known as "flash mobs" — gatherings of people who use social media and text messages to stage a spontaneous group "dance-in" at a train station or get a big crowd together to imitate statues in ...

A group of people who gather at a predetermined time and place to perform a silly prank such as yelling at the top of their lungs for 30 seconds and quickly dispersing before the police arrive. Using ...

These gatherings usually start out as manageable, well-behaved, fun events, celebrations, or parties. They can be viewed as rites of passage or just people blowing off a little harmless steam. The ...