As soon as I turned my head and looked behind, I could see that the people behind me had disappeared, that there was a big hole in the ground, and that there seemed to be some cloudy gas coming out of the hole. Are there ghosts below? I quickly stopped the car, turned a corner and came to the big hole. Those guys were really unlucky. We didn't fall from here just now. As soon as they came here, they suddenly fell down. It seems that they have learned something so coincidentally that they can meet each other.

I looked inside and saw that the hole was deep below, and...