"Gryffindor adventures get people hurt," said Percy flatly, and everyone - thinking of Halloween - winced. "There is to be no heroic rule-breaking, no last-minute emergencies that you must handle. If anything goes wrong, it is not your job to fix it." He gave an especially pointed look here to Ron, with whom he was still somewhat annoyed for getting himself bitten by the dragon he wasn't even supposed to be dealing with. Percy said, making clear eye contact with every single one of the kids, "You will not leave the Tower even if you hear from some older student that there is a dragon loose on the grounds, or that Hagrid's hut is on fire, or any other absurd problem that I cannot currently think of. If anything happens, I will handle it, because I am not breaking any rules." This was technically true; Percy was not actually going to break any Hogwarts rules.