User blog comment:IamJakuhoRaikoben/Chapter 383: Surfer Lucy, Review./@comment-5840892-20140509163530/@comment-7418318-20140509190822

From my end it looks like you don't understand it. If you said "for a change" I'd have been... not fine, but at least I wouldn't have bothered to say anything. Not that it's true, but I'm growing tired of endlessly re-arguing the same points over and over.

But the "for once" strongly implies that it is the sole exception, rather than one of several.