Funny Best Buy prank

50 people dress up in the Best Buy uniform (blue polos, khaki pants, and sneakers) and walk into a Manhattan Best Buy.

Here's the lowdown.

This is a cultural phenomenon known as a "flash mob".

A flash mob is a group of people who assemble suddenly in a public place, do something unusual for a brief period of time, and then quickly disperse. They are usually organized with the help of the Internet or other digital communications networks.
The term has also been applied to distributed mobs, who use similar means to co-ordinate sudden large scale simultaneous actions in multiple locations. An example of such an action is the widespread use of mobile phones in the 2005 civil unrest in France to co-ordinate widespread social disruption.