"I'm thinking you may have erred slightly, Miss Pienas,"  Leopold said with a slight grin, as he watched the pizza try to grab the wand the girl was using.  "Stupefy!"  The pizza shuddered and lay still.  "Odd," he said, looking at the pizza.  "I don't think I've ever had to stun food before.  Try again, Miss Pienas.  Don't worry about trying to outdo Miss Collins.  Just transfigure another slice."

He stood beside Obderedria, watching her wand movement.  "A little less of a twist in the wrist should correct the problem, I think."