I was at an old, seemingly abandoned building. I had Physics tuition.
When I was walking to the room where we usually have tuition, my tuition teacher appeared out of nowhere and told me: Go to the upper floors.

We had never been to the upper floors.
I went first, passing by the usual room on my way to the stairs. I told everyone: Teacher said lessons are at the top floor today.

Being in the lead, I walked up the stairs first. There was a corpse blocking the stairs. I was scared, but I had to go to the upper floors. I jumped over it and continued climbing.

It felt weirder and weirder the higher I went. It was chilling. When I arrived at the top floor, I saw corpses everywhere. The place reeked of death. There were corpses sitting in some of the chairs where I was supposed to have my lesson. There were corpses seated against the wall with their heads down.
I knew everyone was dead, and I began wondering how long they have been dead. I couldn't help but notice the cold. It felt like there were spirits passing through my body.

I began chanting prayers mentally. I couldn't move all of a sudden. I don't know how, but I was lying down. In my vision, I could see an article. It was a list of the names of the people who were found dead in the building I was at.
I saw my name in it. It stated that I died with my head detached.
Impossible, I thought. My head is still attached to my body. This couldn't be.

I was lying on my bed all of a sudden. I tried to open my eyes. But I couldn't. I laid on my bed for a while, feeling groggy and confused. I tried to open my eyes again. I managed to open one eye, then the other. Finally, I was awake.

I was still chanting the prayers when I got off my bed.