My Story: This incident happened in St Andrews Secondary School. There are lots of flats around the school. The residents staying at the flat around the school had been complaining that they heard the bell ringing at night and the school watchman complained that every night, the biological lab light was on.
The principal was concerned about it and said that he will send people to see whats going on. At midnight, the light got on and one of the servants went to see who was it. When he went in, he saw a skeleton face to face and after that, he never stepped into the school.
From then on, they put a metal cross outside the biological lab. From that day onwards, the children who need to go to the lab have to go by anotherway.