Sadly it wasn't on Dar but on one of my alts. I did manage to pull myself together enough to get a screen shot. It happens so fast that you really don't get a chance to do much more than realize that your screen is going red, Deathwing is coming, he is unbelievably huge and BOOM your dead. So far I know only two others that have gotten hit. One, my mount farming partner, logged onto his Hunter in the Plaguelands to get one of the new pets and got it, not even realizing what happened, it was only the achievement popping up in Guild Chat that told the rest of us. Then later he missed out on getting it AGAIN on another alt by walking into a building, our healing lead who he was questing with got it because SHE was standing out side the building.