When you are admitted to a hospital, they place on your wrist a white wristband with your name on it. But there are other different colored wristbands which symbolize other things. The red wristbands are place on dead people.
There was one surgeon who worked on night shift in a school hospital. He had just finished an operation and was on his way down to the basement. He entered the elevator and there was just one person there. He casually chatted with the woman while the elevator descended.
The Doctor said "that was the woman I just operated on. she died while I was doing the operation. Didn't you see the red wristband she was wearing?"
The woman smiled, raised her arm, and said "Something like this?"