The raid testing for Cho'gall started on Thursday all of a sudden, but we were kind of expecting for it despite no announcement being made. We got a raid group together pretty quick and went to town on it. Not only does Cho'gall have the ability to corrupt players and turn them into monstrosities, he's also able to cast raid-wide mass disconnects and cause crashes. We gave up after knowing the basics of the fight and occasionally spending 15+ minutes after a wipe getting everyone back inside. The instances were quite bugged out, but it's understandable since the game is still in beta testing.