Queue in India!

Was taken aback, when I saw random people who were sitting in Mettupaalayam railyway station, suddenly jumping and forming a queue to board a train that had just arrived. I don't remember the last time I saw, queue formation anywhere in India. There were two policemen also.. they regulated the entry of people. Then came to know that the queue was for boarding the unreserved compartment. Things like this also happen in India..Hmmm..