He'd just about given up hope that there was anyone else in this projection but himself, although he might not have traveled far his hollering would surely carry anywhere in the structure...and much of his hope was already extinguished before he even arrived in this place.
He'd just about given up right as he almost collided with...not himself.
He gaped, as surprise melted into dread and then resignation. Perhaps he'd been wrong about how quick and painless the watch was. The Doctor himself had come to dispatch him in his own mind. "Have you come to take my place?"