After a few seconds, the moaning and bone-snapping stopped. There was silence for a moment which felt like an age. Then, the silence was broken by a low-pitched growl and some sniffing. After that, 2 red eyes emurged from the darkness - they were all you could see in the black.
Then, after the eyes had weighed up their odds, there was a loud barking and they disapeared further into the ruins. You could hear a scampering across the stone floor for a while, and then the silence crept back into the group.