"I promise to be good so you don't ever have to arrest me," Justin joked. "The potions classroom isn't the problem, it was the potions sotreroom tht gave us hell," he said. "Corner's had a hell of a time making it even safe enough for us to get in there. All those ingredents were not meant to be mixed all together like that. We have to have a chilling charm on the whole place too. Ashwinder eggs. We had the same problem up in the Room of Requirement. Took us forever to figure out why we kept ending up with fires up on the seventh floor." Of course, the little snakes that appeared when magical fires burned to ashes were something they'd had to battle in a few places in the castle, but it gave them enough of the tiny grey eggs to use for potions classes for the next two years.
Justin shook his head. "Sorry, Morag...you know how I get when I start talking shop, you can't stop me."