For as soon as Harry's tongue touched her nipple, and the runic spells on each met, Hermione exploded in a screaming orgasm of such ferocious intensity that she caused the bookcase covering the door to the alchemy cell to completely shatter. Books and ripped pages cascaded to the floor, some flew out and smashed into the walls opposite, as raw magic and pleasure burst free from Hermione in pulsating waves. It was so overwhelming that she had to wandlessly push Harry's head away from her a moment, just to strive for a few lungfuls of clean air.