Last night, we were settling down and getting ready to fight the Assembly of Iron in Ulduar. This involves three bosses who need to be tanked separately. One of them, to whom I always get assigned, casts spells which damage the raid but can be interrupted.
My warrior has access to some interrupts, and last night I was also assigned a rogue to come and help me out with some more. The rogue who was to be my interrupt-assist is a nice guy, but notorious for his lack of focus and the length of time it takes him to understand the mechanics of a fight.
So I whispered to him that there was a special achievement you could get if the boss didn’t get off a single cast! He whispered back excitedly that he wasn’t sure we could do it but he was going to try — and he didn’t put a foot wrong.
In the end, the joke was on me, because I checked the Ulduar achievements later and there really is one …