Annabelle was outside the fog when she cracked the whip into it, then the fog shifted over her, then Krenna leaped up and socked her. But if Annabelle had been covered by the fog prior, I don't see how she'd have seen Krenna coming. It's not a big deal, but it does inform my next post in whether Annabelle would have had an opportunity to try (and fail, since Krenna hit her regardless) to defend herself, or if the sucker punch came out of nowhere.