When you have travelled in Metro often , a few times , occasionally or atleast once then you might have noticed a button that will help you communicate with the metro loco pilot. This is the emergency button, if in emergency the button is pressed, pilot will stop the vehicle , open the doors of the metro and/or take appropriate actions. The emergency button when pressed will lead to punishment ie penalty, however when pressed in real emergency will save live(s). We have seen the button, we remember it vididly and joke about the button with our friends. However the