Sarah's walker fired a single burst that thrummed like a bass drum amidst the dull clanking of the station, and blasted the poorly armed mutant into a nearby wall, making a decent dent in the station.  Arkhah dashed along through the maze of corridors, quickly finding himself behind a patrol of 5 mutants, already screaming at each other in some unwholesome tongue about how they<em>definitely</em>heard something.  One of the guards tossed a grenade in the general direction of Arkhah, his throw going wild as the frag grenade bounced down a side corridor and detonated harmlessly 7 meters away from Arkhah.  The biggest mutant aimed his shotgun at the mutant who threw the grenade, grumbling about wasting ammunition.