"I survived Ghostcrawler.
Basically after he is finally fired..err excuse me, after he moves on, if you are still playing, you get this achievement."
I'd go with this...
...even though I think achievements in WoW, and in gaming in general, are one of the lamest and dumbest things ever added - from a player's point of view.
As a coder and student of the MMORPG genre, I think achivements are beautiful. Getting paying players to waste enormous amounts of time doing activities that yield no tangible reward has to be one of the all time great feats of timesink. Somewhere the bliz dev who thought this up is still laughing.
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Think of how stupid the average person is, and realize half of them are stupider than that
- George Carlin