on thrsday 3.11.2011 i went 2 seunderabad reservation counter to book tatkal ticket for this train for 5.11.11 n i went early in the morning . I was just 4th person in reservation counter. When i gave my forms to booking clerk i was surprised hearing w/l 15 from her. How could tatkal tickets can full within five minutes. does agents block some tickets or any other reason , please explain.