That's probably an example of the better animation during that episode. I was referring to stuff like this.
Someone linked these in a discussion thread last week as an example of the poor animation. http://imgur.com/a/KI2Zz (big spoilers if you're not caught up with the anime) They're still frames, but it pretty much looked like that in motion, too.
Btw, you might want to link to that gif and mark it as spoilers since it's a pretty big one for anyone who isn't caught up with at least the anime.