Justified

There is an unspoken rule that the people who have waited at the train platform longest board first. They waited and should get first crack at a seat. 

I was standing waiting for the train (along with lots of other people) for a while and eventually I saw it coming. Just as it pulled in, this tiny little Asian lady approximately my age came running down the edge of the platform, cutting in front of dozens of people. I turned towards the train, my frame blocking her from getting around me, and she started yelling, "Excuse me! Excuse me!" in a thick accent trying to shove around me. 

I didn't budge, the door opened, and got on with her muttering under her breath behind me. She couldn't see the smile on my face.