Jacob quickly put his sword in front of him to try and block the feathers, but in doing so made the fatal mistake of forgetting about Abby, who's speed he strongly underestimated. Before he could even think, the girl was behind him, and the joy of blocking the feathers was immediatly turned into pain by Abby's kick.
It appeared that she was more agile than Jacob, and if that speed was not just explosive power she had quite a bit of stamina too.
Fuck it, I'll just drag you down with me I guess He thought, as he threw his sword straight at Abby, in an attempt to distract her. His plan was quite simple: the girl was clearly a devil fruit user so she couldn't swim, right? Just distract and charge her at full speed and try to knock her, and the unlucky marine-spectators who just happened to be in the way, off the dock.