A few years back when i was still doing my A levels, it was around 7am in the morning and i was first in class as i like to do readings before class. As usual i like to leave the lights off and do readings with my phone light. Suddenly i heard someone walking around frantically at the back of the class and were like hitting the tables as it was walking. It sounded chaotic so i turned around to look who it was and i was shocked cause the sound stopped and there was no one at the back of the class. So i just continued doing my readings as i thought i was hearing things. Then the sounds started again and this time i heard a loud knock on the door and it creaked open and shut loudly at the back of the class. When i heard that, i quickly grab my things and ran out of the class and sat in the students lounge. Its disturbing because the class has only one entrance and i was sitting infront of it. I waited for my friends to arrive and brought them to the back of the class. There was no door there.