I've been running across some foes here and there that have periods where they turtle down and block all attacks for a time. These are ordinary open world or story instance mobs, not champions or elites. I remember some flying knight thing in some of the later personal story instances in Orr, and I've run across others in the open world in some of the expansion zones. You'll be fighting, and they'll hunker down and block everything for several seconds.
It's not a huge deal, since while they're doing it they aren't doing damage either, but it's kind of annoying to stand and wait for them to be done in order to finish them off. SIs there someway to disrupt this turtle behavior? I tried looking up blocks on the wiki, but it's written from the point of view of player skills that block, not skills that break a mobs blocking.
I mostly play a Condi Mirage and a Staff Deadeye. But if anyone has info on a type of skill that disrupts this kind of thing, that will at least point me in the direction of finding out which skills are available on which professions.