Focusing as much as she could, she sent an overpowered stunner chained with a dark curse towards the professor's back. The potions professor sensing danger raised a powerful shield with the flick of his wand, the stunner was mostly absorbed, yet the extra power meant it cracked the shield as it did so, allowing the chained dark petrification curse to hit him square in the chest, which caused him to fall, his body tied with slimy vines that caused his body to go into temporary paralysis as soon as it came in contact with his body. It would have been absorbed by the shield if used by itself, yet it is better than the regular body-bind, where only a specific counter-curse would remove the binds and ennervate the victim. The sudden barrage of spells caused Ron to come off his daze and he realized how dangerous Hermione really is. He needed to get back to Hogwarts and warn Harry. He picked his wand out of his back pocket and moved slightly towards the witch.