http://www.wowhead.com/?spell=11641#used-by-npc

That's the version they're using in ZF {and a few other places}. Various comments under the individual mobs indicate that you can use tremor to remove it, grounding to eat it, and you can remove it with anyone who can cleanse magic.

Beyond that, dealing with a disabled tank....

Druid - Root, Cyclone
Hunter - Traps, pet
Shaman - Earthbind, Stoneclaw

Eventually you'll also get the elementals and your own hexes.