you were wandering around a bunker, it was dark, with only some lights producing a yellowish light in those claustrophobian tunnels. Suddently, you hear some ruttling and heavy breathing noises coming from above you. You ignore them for now and keep going. As you proceed, you suddently see an hole in one of the walls. As you try to examinate it an horrific creature comes out of it, on all fours, staring at you, with its mouth hanging open and dripping some blood. It starts to approach you