Without thinking, Pinkie grabbed a rock out of her bag and launched it the head of the pony attacking Azure, clipping her across the top of her head, not hard enough to kill, or even really hurt, but it was enough to knock off the mare's helmet, giving Azure enough of a distraction to kick up at the mare, off-balancing her enough to wriggle away. To make sure Azure did get away, Pinkie threw another rock, punching a neat dent into the mare's forehead, killing her.