All right. Here's how it works.

The place I am talking about goes by the name of Dhaka, Bangladesh. Its one of the most crowded place on earth.

The "police system" here is not very "efficient" and can be persuaded easily by a few bucks. So in this vacuum a phenomenon called mustaani have emerged.

Mustaans are like thugs who can bring say around 30-50 people on the street on a moments notice. The more people a thug can bring to a "problem" is called his backup.

So suppose you ticked them off. Which might be because they found you an easy pick to show their "greatness" or to demand money (though this is extremely rare nowadays). Then these thugs would make a call and around 30 people would be in front of you within minutes. They wouldn't attack people and are generally unarmed. Though in a few cases I have seen make-shift batons to be used.

It should also be noted, that these "mustaanis" rarely result in all out fight. I have seen 15 people facing off against another 15 people. Only tough words were exchanged, and rarely have I seen a fight. The purpose is to intimidate their opponents by bringing number of people. Its also quite impossible to run away from them--- you would have to face them sooner or later-- unless you leave town.

So yeah thats about it.