He wouldn't make it to Luna holding Hermione up like this. She was too weak. He turned to Lupin, begging him to take her from him, but the lapse in concentration caused Lupin to be hit in the chest with a stupify sent by an Order member and deflected by a Death Eater. It hit Lupin hard and although he didn't fall unconscious due to his werewolf abilities he did fall to his knees and clutch at his heart.