The sound of another hiss reaches you

With a strain you look over to one of the far walls, your eyes still watery. Despite that you can see the black outline of an another creature, approaching from an almost invisible passageway. Looking around you notice more passageways, and more creatures... Many more creatures. Dozens of the creatures enter the room, some crawling along the roof and walls like insects. You also notice that there were already some in the room beforehand, hidden in small alcoves in the wall, their bodies blending into the walls perfectly, who began to stir, awakened by whatever brought them out. A horrifying realization hits you; it's a nest, a hive of these things. And the one standing between your legs called them here when he screeched.

Your realization is short-lived however as one of the creatures out of view behind you suddenly pulls your head back. If you were standing straight, you'd be looking up to the sky. Instead your eyes are looking at another slit, the same viscous slime oozing from it, and the same inhuman tip beginning to grow from it. You whimper at the thought of what was about to happen, only to groan loudly in pain as one of the creatures fell from the roof and landed upon your chest, sitting atop you. Reaching down to your head the creature sitting on your chest uses one hand to hold your head still, the other grips your jaw, forcing your mouth open. The slit before your eyes moves closer, the foul taste of alien pre once more filling your mouth, followed by the pointed tip that fills your mouth. A chorus of screeches echo around the room as the action drove the horde into a frenzy.