This minor racist moment occurred on the train this morning:
A woman who looked around 60-something got on the train with a Chinese girl. The girl was being a good samaritan and had carried her suitcase up the stairs for her. The woman did thank her for this, but then the following happened, pretty much verbatim:

Woman: THIS TRAIN GOES TO THE AIRPORT, RIGHT??
Girl: Yes.
Woman: ARE YOU SURE THAT THIS TRAIN GOES TO THE *AIRPORT*?!
Girl: Yes.
Woman: THE AIRPORT. I NEED TO GO TO THE AIRPORT.
Girl: This train goes to the airport.
Woman: OK BUT I WANT TO BE SURE THAT THIS GOES TO THE
AIRPORT.
Girl: YES.
The girl then scurries off to a seat further away from the woman. The woman then turns around to another older lady and this happens:
Woman: Does this train go the airport?
Lady: Yes, that girl just told you that it does. All the trains from this station go to the airport.
Woman: WELL I JUST WANTED TO MAKE SURE. I DON'T KNOW IF THAT GIRL UNDERSTOOD WHAT I WAS ASKING.
Girl:
