"Right, then," Lockhart said loudly. "Let's see what you make of them!" And he opened the cage.

It was pandemonium. The pixies shot in every direction like rockets. Two of them seized Neville by the ears and lifted him into the air. Several shot straight through the window, showering the back row with broken glass. The rest proceeded to wreck the classroom more effectively than a rampaging rhino. They grabbed ink bottles and sprayed the class with them, shredded books and papers, tore pictures from the walls, up-ended the waste basket, grabbed bags and books and threw them out of the smashed window; within minutes, half the class was sheltering under desks and Neville was swinging from the iron chandelier in the ceiling."