Shuffle

It is a very busy train I got on, and one young guy gets up for the old Asian woman behind me, and she in turn offers me the seat, which I decline (initially) but she shoves me into it. Like... parks me.

Just then another you man gets up seeing this and offers her his seat which she accepts graciously. 

Immediately after that there was this cascade of kindness as young got up for old and men got up for women.

It was a chivalrous tidal wave of dozens of people standing up and sitting down.

Thanks first guy for initiating it, and thanks older lady for causing a scene by sitting my ass down. That was actually pretty damn cool to watch.