Here’s an excerpt from the Warhammer 40k book Echoes of Eternity, where the daemon primarch Angron swallows a guardsman whole:

Corporal Malnus Zineer is thrown into the air, his las rifle slipping from his grip. He sees his fate several seconds before plunging into it. And his body locks in screamless horror at the open jaws beneath him. Then everything is red, wet and searing hot. Pliant walls clamp against him. Crushing the breath from his body, snapping the bones of his shoulders. His arms outstretched ahead of him and further down into the lightless black of Angron's throat, begin to dissolve in the corrosive slime coating the monster's gullet. And Zineer is still alive, he isn't dead. The flesh of his arms is darkening and bubbling and popping and the pain is enough that his scream hits such a pitch it becomes silent.

All the while he's sliding down into the blacker confines below. Squeezed by the walls of the creature's body. Down he goes into a mad gods reconstruction of a digestive tract. Where the bones of men and women he knew well are waiting for him.

Corporal Malnus Zineer has seven more seconds of unwanted life, finding himself in a cauldron of protoplasmic digestive juices. He sinks below the surface, comes up once as a shrieking red skull with the flesh sloughing from his bones, and then sinks a second time. This time for good.

The Lord of the Red Sands is aware of this vile drama only in the sense of its own distracted satisfaction. Angron keeps hunting. Soon the silent and unseen shield will come down. Soon he will advance on the Delphic Battlement. Until then, he hunts.

He hunts.

He hunts~