John had a moment of pure fear as the robot came towards him... but this model was obviously referring to the resistance, and not his death. He smiled a real, genuine smile, and before he could stop himself, wrapped his arms around The Terminator's frame. Or about as much as they would reach.
"Are you here to kill me?" he asked, unshed tears in his eyes as he pulled back, taking in the image before him. He knew it wasn't his model... but a familiar face was all that mattered at this point.