My guild and me on the Elegon encounter in the Mogu'Shan Vaults, 10 man Normal difficulty, we also got the achievement.
C'Thun Eu Es
PoV Balance Druid Ñoco
Armory Link: http://eu.battle.net/wow/en/character/cthun/%C3%91oco/advanced
You can watch this and other videos on my youtube channel
I do some livestreamings, if you want to see me live