Dunstan was one of the last Second Years in the common room that night, pouring over Charms revision with his chin on his hand. Eventually he realised that he was getting too sleepy to focus, so he closed his textbook — and fwoof, out went the nearest candle. He blinked with surprise as each went out one by one, plunging Ravenclaw Tower into darkness.

As a few students muttered in alarm, Dunstan — now fully alert — reached for his wand and muttered "Lumos". His wandtip lit, and he peered through the silver light to see one of the Sixth Years swiftly surmising what had happened. Peeves.

Dunstan stood up, glancing around curiously. He heard Peeves' tell-tale titter come from... somewhere. "Where even is he?" he murmured to the Sixth Year.