people are unexpectedly busy with their mobiles when catching trains (free wi-fi to blame?). at least some of them do hear (announcement) or see the train (on train indicator) they want to catch in time. see the result of the one who didn't. there are many more who are not so lucky to survive for another train ride. also, there aren't many who survive but not for another train ride. and there are some who attempted their last train ride.