@Serge you see a big trid projector, it is showing something that appears to be a very bad horror trid. You are in the third floor, there is a balcony and a big hall. You can see people watching the trid at the first floor. Due to the loud trid they did not notice the gunshot. You can see many more class rooms on your level around the main hall, as well as the stairs. The second floor seems to be design the same, a ring full of classrooms and the stairs. The first floor seems to be one big hall, filled with specially designed chairs. The 3d trid is projected all int he middle hall.