After finishing his night shift at the hospital, a doctor was preparing to head home. As he approached the elevator, he noticed a female nurse and decided to ride the elevator down together. However, when the elevator reached the first floor, it didn't stop and continued descending. When it reached B3, the doors opened, and to their surprise, a little girl appeared before them. She had her head down and requested to take the elevator.
Alarmed, the doctor hastily closed the elevator doors, leaving the nurse puzzled. She asked, "Why didn't you let her in?" The doctor replied, "B3 is the hospital's morgue, and they tie a red ribbon on the right hand of each deceased person. She had one on her right hand, and so did he…" Hearing this, the nurse slowly extended her right hand and, with a sinister smile, asked, "Is it something like this red string?"