When she hears the noises out in the distance, Jadna freezes, waiting for Mars and John.  Crouching low, instinctively, she narrows her eyes, then closes them and counts to ten before re-opening them... trying to force her eyes to adjust to the dim light.  Seizing Mars with one slender hand, she pulls herself to his ear, stretching to reach it... with an urgency in her whisper that's only partially intentional, she hisses, "Do you hear that?"  She waits for his reply, and after it comes she gingerly tests the broken brick and slate at the base of the walls for pieces of loose stone... hoping to find a fist-sized fragment.