This one has been going around for some time.

An elderly doctor at the Makati Medical Center was riding the elevator going down to the lobby. Next to him is another patient. A bell sounds and the car door swings open. In front of the pair stands a young boy. The little boy asks: "Down?" The doctor looks up and down the young man and, with a slight crackling in his voice, answers: "No, this is going up." He then presses the button to close the elevator door and sends the car on its way.

The patient, confused, asks: "Why didn't you let him ride with us. This car is going down anyway." The doctor looks to the patient and says, "He was my patient a week ago. He died of leukemia."

There is a short silence. The patient then asks: "How do you know he died?" The doctor glances back and says, "Well, he has a blue band on his ankle. That means he's dead."

The patient sticks out her foot and asks the doctor: "Oh, you mean like the one I have?"