Samantha, you get back here and unlock this window right now, you hear me? I mean now. Nownownownow. And just in case you decide not to check this at Zoe's house for once, or in case you do check and decide to ignore this, if you're not back here in fifteen minutes, I'm sending an owl to get you. Wizarding secrecy be hanged; I want off this roof and I want off now.
And don't even try to tell me about how I'll catch it from Mother for being on the roof trying to catch your cat, because if I'm not down soon, you'll be catching it even worse for stealing my computer and stashing it up here as you obviously have done. Unless you get right back here and unlock the window. Am I completely clear?
ETA: I have gotten down from the roof, and now I would appreciate it if no one ever, ever mentions this to my parents. At least not until Samantha and I are both grown witches who can defend ourselves against our parents' righteous anger. Because, while I am not in the least sorry for sending that owl after Samantha, and while it did turn out all right anyway, I really don't think our parents will see it quite in the same light. And so we've decided that they don't need to know any of it.