|Image Courtesy: http://liveindia.tv/india/delhi-metro-introdues-six-coaches-metro-train/|
The moment a 4 coach train arrives at the platform and if it is the peak time hours - there is a big chance of a lot of people rushing towards the 3rd and 4th coach of the train to get in, those who were standing for the coach no. 5th and 6th.
At times even if the guard is standing, people standing in queue forget everything and go mad to rush the moment train stops at the platform. Basically it depends on an individual to go mad with a mad in such situations or stay calm and let the mad person trying to create such chaos be ignored and isolated. Probably that would be the ideal situation one day when nobody rushes with an individual culprit trying to create a havoc and thereby creating an embarrassing situation for the wrongdoer.
From June, all the balance metro trains with 4 coaches will also be 6 coaches thereby accommodating more people at peak hours and also removing the confusion of 4-coach or 6-coach for next inbound train on the platform.