Hermione’s offensive spells were getting better, getting more creative with her charms and curses that the boys taught her, and that she read in some of the books she brought. She was able to give Harry and Ron a proper duel this time around. But it was still two against one, and her reflexes were only so fast. She was caught off guard by an Impediment Jinx, which slowed her movements. This gave Harry and Ron enough time to descend upon her and wrestle her to the ground.