I once saw a car with a flat pulling over and noticed the lady was well dressed and in no way was she going to be able to change the tire. I pulled over and offered to help and she accepted. Took all of 8 minutes to change the tire and she was ready to go.
When I said "Ok your all set" she offered to pay me for my help and I politely declined and said it wasn't necessary. For this she said I was being rude by refusing and should be ashamed of myself.
There's just no explaining some people.