Nile gets off Maximo. He wanted to inspect the headless guard's corpse closely.
For the head to get smashed that badly, it means there is a rather strong entity inside this Mini Zoo. Or perhaps there has been one.
The neck of the headless guard has been mangled. A few mutated maggots squirmed and wriggled inside the mangled neck. In the area on the back of the headless guard's supposed to be 'head', is a wall that has a deep dent in it. From that alone, Nile could confirm that it was definitely a pure brute force that had crushed the guard's head.
Nile stood up and came towards the inner area of the mini zoo. There, he saw a bunch of rusted metal that acted as the barrier for a hollow pit below. The rusted metal barrier had many pieces that were bent and twisted. The bent and twisted area formed a circular opening that leads below.