The Celebrity's Car Breakdown
A driver stops to help another motorist stranded beside his/her disabled car. The driver changes a tire, provides a tow, and transports the other driver to a service station and back, and so on. Although the stranded motorist does not identify themselves at the time, later the Good Samaritan recieves an expensive car or some other lavish gift and learns that the person he had helped was a celebrity or the wife of a celebrity.