Jim moved down the passageway a couple feet before it opened up into a much larger room. It was about three times his height and generally spherical in shape, though by no means precise.
He played his light across the walls, noting that they seemed odd. They weren't rock, or at least the rock was covered in something slimy. And the floor was damp. His shoes seemed to sink slightly into the slime.
Everything about this place just screamed that it was wrong.
Jim turned to leave, but the opening that he'd come through seemed to have closed off. He resisted pushing against it because he didnt' want to get more of the slime on him than he had to, but then he turned around and looked again.
Was the ceiling lower than it was before? And what was that strange gugling sound? It was like he was...
He felt a chill up his spine. It was like he was inside some kind of beast! Now as the thought came to him, he could actually see the walls slowly close in.