


Their eyes are closed, their skin is pale, stretched, and macerated from prolonged contact with the headcrab's innards, and any hair is left flattened and matted with blood,

As a result, the victim is left with an unnerving "screaming" appearance. Removal of the Headcrab reveals that the host's head is bent abnormally up and back, forcing the jaw in and down. Through some unknown biological process, the host's hands turn into long, skeletal claws, while their chest cavity opens to reveal a massive maw, with the victim's ribs as "teeth." Zombies have been observed using this modification to feed by ripping chunks of flesh from corpses. Once a Headcrab successfully attaches to a human, it will assume control of most, if not all, of its motor functions. The original Zombie scientist from Half-Life.
