“正常”的精神病人某精神病院的医生被一群病人一直烦着要出院,最后终于受不了了,就在墙上画一个门,告诉病人说:只要你能打开这个门就可以从这出去了。于是,不断有病人尝试开这个门。只有一个病人不去开这个门,还嘲笑他们。医生心里想,终于有一个人待到正常可以出院了。于是,问他说:你为什么笑他们呢?病患回答说:因为他们不可能打得开,这个门的钥匙在我这! “Normal ” mental patient A doctor in a mental hospital has been bored to be discharged by a group of patients, and finally can not stand it. He draws a door on the wall and tells the patient that as long as you can open the door, out. So, there are constantly patients trying to open the door. Only one patient did not open this door, but also laughed at them. The doctor thought, finally someone can be discharged until normal. Then he said, “Why do you laugh at them?” The patient replied, "Because they can not fight, the key to this door is mine!