Armed only with gear from previous instances and no PvP gear, three Tauren kill Murmur of the Shadow Lab (and clear the rest of the instance too).

Admittedly it's not the hardest boss in the instance to kill. In terms of our 3 man makeup the hardest encounter in the entire instance is probably the double shadowpriest pulls just before Blackheart (since we have no CC).

But who wants to use trash spawns as the movie to show we managed to clear the instance? .