Gregor slowly pushed his way over to the door with the chair. Once there he let go of it and threw himself onto the door, holding himself upright against it using the adhesive on the tips of his legs. He rested there a little while to recover from the effort involved and then set himself to the task of turning the key in the lock with his mouth. He seemed, unfortunately, to have no proper teeth - how was he, then, to grasp the key?