Mornok slings his warhammer as quickly as he'd drawn it and grabs the dragonborn's wrist, wrenching it behind him just hard enough to let him know that he is no longer in charge of his own body. He orders the new prisoner to put his other arm behind his back and grabs it with his other hand, locking it in a similar position and crossing the other. Then, hearing the woman's voice he forcefully marches his prisoner through the door.
"Aye, we be in yer' debt m'lady, though we come t'help."