I read it from a book of urban legends. I don’t really remember any others at the moment; I do recall many of them being at least vaguely spooky.

I think that was the same series in which I read a story about a random motorist helping someone who was broken down, then arriving home to find his mortgage had been paid off by a grateful celebrity. In my book, the celebrity turned out to be someone who is now president, but last time I told this story several people responded to state various different wealthy people who had been in the version they knew.