Her action, at least in this one, is a little confusing. I think she was trying to go for the "Oh some much is going on! What's happening!" kinda thing, but it just comes out as "uh...how the hell did that happen." And she also uses the same "Everything went black" to describe when Harry is knocked out, and when they Transport themselves someplaces else (I forget the exact term they use in the books.) and since both are usually done while they are under attack it leads to some confusion on which exactly happened, until it's established which did happen.