It's a horrible thing when people are unable / refuse to change (even when circumstances change).
I have run after busses, missed busses, got in and out from really crowded ones but that doesn't mean that I would carry that behaviour with me for the rest of my life. 
What really leaves me speechless is the fact that people run for the metro. c'mon next one is after four minutes. Why risk a broken leg for that? Or risk hurting the other people around you? Carolyn is right that most people on the streets are hugely inconsiderate about other people being around them. 
(btw, this discussion about crowded busses just reminded me of a story from "Dirty Havana Trilogy")