You know, in one section I manned a minigun in a tight corridor and cut down over a dozen mutant monkeys, including a mutant who was constantly firing rockets out of one arm. Several explosive barrels went up in flames during this long and loud encounter. When nothing more was moving, I began to walk down the hallway. I passed a door just a few feet from the mounted cannon, and as I did a voice was heard to say "Did you just hear something?" And then three assholes come out of a small, adjoining room. All the gunfire and explosions didn't spook them, but my soft footsteps made them wonder just what the fuck was going on out there. I opened up on them, point blank, with an automatic shotgun. After ten shots, the clip ran dry and two of the troops retreated slowly back into the room.