英语笑话:I'm the Only Driver（唯有我是司机）

A short young man was running behind a bus which was full of passengers. But the bus still ran at a great speed.　　"Stop, stop, " a passenger looked out of the window, and shouted at the young man, "you can't catch it ! " 　　"I must," the young fellow said, out of breath, "because I'm only driver of the bus.