“Do not let the lights go out under your cauldrons,” the potions master instructed first and foremost. Robes billowing as he turned and wrote the potion on the board, he whirled back around a moment later.

“I mean it, Peeves,” he glared at the poltergeist, mentally muttering about the ridiculous idea of giving the poltergeist and caretaker a potions lesson over the summer.

Peeves pinched the flame, extinguishing it instantaneously, following it with an innocent look. “Oops. Sorry. I was seeing if it was hot. It wasn't.”

“No excuses. You are dismissed from this and ALL potions lessons.”