Thank you for the bolt in Al Quoz, and for not taking my money

My car stalled in Al Quoz on a July afternoon, forty seven degrees, and I was sure it was the engine. A mechanic walked over from a small garage, checked the battery cable, tightened one bolt in thirty seconds, and refused any money. He said it was too small to charge for. I went home with a working car and a feeling that someone had treated me as a person, not a customer. The bolt is still tight. I have thought about offering him something. I do not think he would take it.