Tim didn’t know where he was. His mind was initially in that pre-conscious state, and unfortunately, it spiraled down to a completely unconscious state in a short time, it wasn’t nice! Something about these tunnels was weird, as it destroyed any ounce of critical thought that he had!
An active conscience was what defined a human from a dumb animal, and in this case, since his conscience wasn’t really working, Tim was trapped within his own body and mind. He was trapped, and he wasn’t aware of that fact either, due to the very conscience that he lacked. If he was aware, he would be absolutely terrified!