One day, there were too many people on the bus. It was extremely hot and suffocating. Someone farted, which worsened the environment. My friend couldn't stand it but didn't know who did it, so there was nothing he could do. Just then, the conductor was asking: "Who hasn't bought a ticket?" My friend suddenly came up with an idea and shouted loudly: "The one who farted hasn't bought a ticket!" Suddenly, a very fat woman raised her ticket high and shouted: "I've already bought a ticket!"