He went home for booster cables and would not tell me his name

It was minus twenty in Inglewood and my car would not start, and I was already late for work. A man walking his dog went home, came back with a set of booster cables and his truck, and had me running in about four minutes. He would not say his name. He said somebody did the same for him once. I think we are all in a chain. Last week I jumped a car in a parking lot. The man said thank you. I said, it is a chain.