Here is my story.
When we moved to Kentucky in 1997, we were just getting settled in and didn't even have a cell phone yet. One Friday we was going to the grocery store in the next town when our Volvo's alternator bad and the battery died. We made it to a gas station, we sat there with the hood up for an hour, we didn't know who to call. Several people with big trucks and boats just drove by us, we were sitting there with three kids under the age of 12 and was stranded. Finally this older man stopped to help us. I told him what the problem was a he insisted on driving me to the nearest parts store was was 20+ miles away. When we got to the parts store, he tried to pay for the parts, I had the money and wouldn't let him pay. Anyways we went back and he brought his tools and helped me get back on the road. As he was leaving I asked him what his full name was so I could properly thank him. He just smiled and drove away.
Fast forward 3 years and he walks into my Printing and Sign Shop needing a sign for his Mason's Club. By then I had grown my hair long and a beard so he didn't recognize me. I made the sign and when he came to pick it up, I looked at him and said "Paybacks" are Hell aren't they, he looked at me, and then remembered, I tore up the $800 invoice. He couldn't believe it.
Please tell us your story when someone unselfishly helped you, and you was able to pay them back.