There is no bus driver

双层巴士司机嫌醉汉话多，便请他到上层找个座位坐下。不一会，醉汉就下来了。问其原因，醉汉说：“上面司机不在，不安全。”

The bus driver of a doubledeck bus thought that the drunkard talked too much,and told him to go to the upper deck and sit down.A moment after,the drunkard came back down.When asked the reason why,the drunkard said, "There's no driver on the upperdeck,it's not safe."