One time when I was in line at the supermarket check-out counter, a man jumped the line. A lot of people in line scolded him. He felt very embarrassed and walked back to the end. Someone then came up and asked me if the line was for credit card or cash use. I told her it was for cash, not credit card. I wasn't sure if the person standing in front of me was standin in line, since she left her place, then suddenly came back with some goods. So I asked her if she was cutting in on the line.