Six people were travelling in a compartment（包厢） on a train. Five of them were quiet and well behaved, but the sixth was a rude young man who was causing a lot of trouble to the other passengers.At a station this young man got out with his two heavy bags. None of the other passengers helped him, but one of them waited until the rude young man was very far away. Then he opened the window and shouted to the young man, "You left something behind in the compartment!" Then he closed the windows again.The young man turned around and hurried back with his two bags. He was very tired when he arrived, but he shouted through the window, "What did I leave behind?"As the train began to move again, the passenger who had called him back opened the window and said, "A very bad impression!"