I read this small story in the book ‘Be an extraordinary person in an ordinary world’ by Robert Harold Schuller.
A bus driver in Chicago had a female passenger who was really irritated by something. She let loose with a string of unacceptable words. People felt embarrassed and uncomfortable. And then the bus stopped, the profane passenger got ready to disembark, and the bus driver said – “Madam, you left something behind.” She asked him what it was and he said, “A very bad Impression!”