Originally posted by Rhapsody:

Seems like animation bug, can't really determine if it's any serious issue though. You do more damage by careful timing of parrying and counterattacking instead of trying to cancel animations... but maybe you can make it work just for that purpose, I dunno.

Its really good for wrecking bosses during their "please hit me" animations. I have mistwalker with 50 sword skill and the secondary combo does just shy of 1,000 dmg. This guy kills the queen with it and timestamps every time he does either the primary or secondary version of the combo. Its devastating.

https://www.youtube.com/watch?v=F67Bnr6JwdA