The sound of claws striking mettle grew and grew, as more and more sets of feet seemed to join the charge down the unseen end of the hallway from the other side of the school, suddenly a single monstrous shriek peeled off. Bouncing and reverberating through the halls and into the hab block. It was the sound of a creature that knew nothing other than death, of a being who's soul purpose was to survive, to adapt, and to overcome. It spoke of primal rage, cold unfeeling violence, and a never ending hunger.....and it did not speak alone! Before the shriek had even reached its highest pitch it as joined by an uncountable number of fellow shrieks, each one joining with those around it to form one singular sound. It was the sound that nightmares are made of, the sound that could drive the week willed to madness.  And all the while the sound of claws grew closer and closer, motion sensors pinged wildly........<br/><br/><br/>And then the first runner became visible storming through the hall like a demonic greyhound. It was followed closely by several their courses intertwining with one another so as to mask their true numbers. they ran along the walls, ceiling and floor, charging as one showing no fear of the firepower that would obviously be leveled against them. Seconds behind them followed 6 black creatures, (http://images2.wikia.nocookie.net/__cb20080619232604/avp/images/a/ae/Alien.jpg) they were larger then the runners and moved with a grace that belied their bulk. They moved on all fours along the ceiling and walls using the runners as an inhuman shield. Their jaws snapping in anticipation of the destruction they were to unleash.<br/><br/><br/>As the horde of creatures closed with the marines' they entered B gun's fire range, with a soft whine the gun cycled up and opened fire with the roar of rapidly fired rounds. B gun's 'SmartShot' computer fired with perfect accuracy it's first target, the lead runner, never even had a chance to realize that it was being fired at before the high velocity rounds impacted on it's body, punching through it and blowing it apart. The remains of the runner fell to the ground it's blood already beginning to eat through the floor. The other xenomorphs moved past it, it's blood landing on them with no visible effect. B gun continued to fire, already selecting another target.