From MC's perspective:
Collapsed Mine,
Just I got the feeling of retreat. I heard some movements ahead. Out of curiosity, I walked in that direction to see.
But suddenly my senses alarmed me greatly. I stopped my movements and stood in the same spot. And I turned off the bright light.
The next moment, the surroundings turned pitch black and dark. I have a vague feeling that the bright light must have alerted something. That's why I immediately felt a sense of danger.
Rumble!
Before I could think of anything the sense of danger appeared again. I quickly wanted to retreat but it was too late. The ground beneath me crumbles all of a sudden.
The ground collapsed and I disappeared into the gap.
This all happened in a blink of an eye,
I should have stayed back in the academy. Now I have fallen into unknown trouble.
Tud!