Then, with a bright white flash and a crack, a crystal ball fell on top of his head and he crumpled to the floor and did not move.
"I have more!" shrieked Professor Trelawny from over the banisters, "more for any who want them! Here-"
And with a movement like a tennis serve, she heaved another enormous crystal sphere from her bag, waved her wand through the air, and caused the ball to speed across the hall and smash through a window.