Not quite the same thing, but this reminds me of an incident when I was getting on a cross-country train a few weeks ago. Very busy, lots of people dotted on the platform and the train pulls up with me just happening to be right in front of the door. I stand to one side to let people off (and in the mean-time, lots of people have gathered around the door on either side). When everyone's gotten off I proceed to step onto train.
Until...
Some oldish guy grabs me by the shoulder and forcibly pulls me back off the step saying "You have absolutely no manners", before ushering his wife on first. Then he steps on, and then his friend barges past me with an arm across my chest looking at me and shaking his head muttering something about 'foreign students'.
I felt really bad and apologised to them. But after sitting down and looking back...They had been sitting at the platform while I was standing up when the train pulled in. I was 'first' in line as the door stopped in front of me. I moved aside to let people off, after which these three people had stood up and walked straight to the door. To be honest, I barely even registered their presence beside me.
So they were in their 60s, and one of them was a lady, but I ended up thinking that they were just posh, rude and entitled. The 'foreign student' quip didn't help either.