human
Please generate a first person description of a spooky cave in the wilderness with sand, a creature, and bones.
assistant
The tunnel roof slopes down toward the south, hampering movement in that direction. Just about eye level there is a horizontal crevice running for about three feet, and at its widest point is about six inches high. A scrabbling sound can be heard from inside it, and sand and small stones are gently propelled out, falling to the floor. Looking down, you see the bones of a small creature of some sort.