Below the surface of Dalia, there exists a monstrous beast that eats humanoids alive. This creature is called the Tayan. The Tayan is 150 feet tall, and 35 feet wide. It nests itself underground, and waits silently for prey to fall into its gaping mandibles, to be swallowed and digested.
Prey inside the Tayan are alive throughout the entire digestion process. The Tayan puts tiny tendrils inside intelligent victims brains, that act as a dialysis machine keeping them alive, and feeding them nutrients.
But the Tayan has to keep victims from moving around, as that could complicate the process, and victims could create injuries for the Tayan. So the Tayan has to have a way to keep victims from moving. So, my question is, how could the Tayan keep victims from moving inside its stomach.
Whatever method you make, it has to have a small flaw that could allow one human (most likely my main character) from being unable to move.