I'm not actually sure. "It's weird to see yourself", possibly? Though, in a world with stuff like Polyjuice Potion, I don't know how rare that sort of thing would actually be...
I'm guessing something vaguely along the lines of the "do not mess with time" warning. Except I can't imagine it specifically, how that might possibly go in the case of someone who's doing what Minerva says not to do.
This is a new thread to discuss Eliezer Yudkowsky’s Harry Potter and the Methods of Rationality and anything related to it. This thread is intended for discussing chapter 122, which is the final chapter of the story.
Happy once-in-a-century Pi Day! (3/14/15 == 3.1415)
There is a site dedicated to the story at hpmor.com, which is now the place to go to find the authors notes and all sorts of other goodies. AdeleneDawner has kept an archive of Author’s Notes. (This goes up to the notes for chapter 76, and is now not updating. The authors notes from chapter 77 onwards are on hpmor.com.)