headcrabs?....*black mesa source themetune* *picture of seko standing against a black mesa corridor wall holding a pistol* *single tear falls onto a lambda sign on the floor* *music adopts a slightly rock like tone as seko runs down the corridor shooting madly at a zombie as the screen falls into black* headcrab zombies are still people...just...puppets...they feel pain and everything but they cant see at all and cant control themselves....