What is the nicest thing you have done for someone?

When I was little, I thought I had a guardian angel, but then the priest at my church said that guardian angels don't leave candy or toy cars or books.  Father Mayer probably thought I was lying to him to have something to say, but it was my honest belief.  I was disappointed when he wasn't awestruck by my close acquaintance with an actual angel and I vowed never to tell anyone else.