"Auuugh! Peeves!" Jamie gave a spluttering, angry cry. He nearly dropped the book in his haste to back up and ran into someone as he did so. The water was cold! It was like liquid ice had been dropped on him and he was already shivering, and damn, but he was about to fall. The floor was slick and wet and the book was probably ruined, and it wasn't his! "Spiteful, stupid poltergeist!" His only hope was that he could draw his wand in time to shield any more balloons, even as he saw more flashes of color coming in his (and whoever's) direction. "Sorry!" was all he could get out as he trod on the person's foot.