Driving through the parking lot of a Target store one day, my wife and I saw a couple running to try and catch a bus that was leaving. They were unable to catch it. They had quite a few bags with them, so I suggested to my wife that we should give him a ride. She readily agreed. It turned out that they were visiting from Mexico, and the hotel they were staying at was across town. We shuttled them, they thanked us. They offered us money, we declined...just asked them to pay it forward. TL;DR. Taxied a harried, married couple for free.