Does it upset you if you see someone who is visibly upset or sad??

We went out for breakfast this morning to this cute little restaurant in Vermont. Our waitress came and greeted us, and I noticed that she seemed to be acting a little strange, like her eyes were nearly shut. We ordered, and afterwards I noticed she was standing, leaning against the wall, sobbing. I felt so bad for her, and I have no idea what happened. But all the other waiters/waitresses were just acting like nothing was wrong.

Anyway, I suppose this is a pointless thread, but I still can't stop thinking about her, and wishing there was something I could have said to make her feel better. I felt so shaky inside, and UPSET to see her upset, even tho' I don't know her. I just left her a good tip and a note wishing her a Merry Christmas.