It was unfortunate for this woman that her hand was still in the horse's bridle. Faustus started as the horse bolted fowards and poor Miss Montague was left with nothing to do but be dragged along. There was absolutely no way he was faster than a horse, unless he'd had a broom, but there wasn't time to summon a broom unless he wanted Miss Montague to be dragged halfway to Hogsmeade in this state.

If he immediately immobilized the horse immediately, the woman would be launched forwards because of the sudden halt and it might do worse for her person than good. Faustus darted after the horse, taking his wand out and pointing it at the animal. Immediately, the horse slowed down; a good sign. As he caught up with the animal, he cast a freezing charm on it which halted it in mid-air immediately.

Now in full auror mode, he went straight to the source of the problem and to the horse's side. It was just as well that his break was almost up, seeing as he counted this as something he'd most certainly have to draw up some papers for. "Miss Montague," he said, first focusing on getting the horse's bridle undone so she could remove her hand. "Are you alright?" Despite horses not being his favorite animal, he knew how to ride them as well as de-tack them; once the bridle was removed, he moved over to the young woman's side, brows furrowed in concern as he took in her state.