It wouldn't be a problem to me except Nora would have likely said it maybe an hour or two earlier. Know what I mean?
Nothing inherently wrong, just feels a bit derivative.
If it were, say, several months or years later, after the tale of the food fight in which she declared it to the world had spread, then it would be more of a reference, since it would be a story people applying at beacon are likely to have heard.

Honestly just nitpicking because bored.