On Tuesday afternoon, I was standing on a crowded airplane waiting to disembark....

On Tuesday afternoon, I was standing on a crowded airplane waiting to disembark. I was struggling to get into my jacket. I had one arm (the right one) in the jacket and I was flailing around (getting more and more frustrated) trying to get my left arm inserted properly, when I felt someone���s hand on my back. I turned. The woman in the row behind me had untangled my coat sleeve and was holding it open for me.
���There,��� she said, when I finally got the jacket on. ���There you go.���
She pa...