So basically, today in music me and my group (2 other girls) got moved to another room because we were being "too loud" and we were doing our work. Just then we heard some kind of locking noise and the lights kept going on and off in the corridors even though everyone was in their lesson(we're not allowed to go toilet during lessons) and when the teacher came in and we asked him about it, he said it's normal and it happens all the time when no one's in the school to him. I'm really creeped out and don't want to go back on Monday. Telling my parents is not an option as they don't believe in ghosts. I felt like I was being watched while I was in the room.