Breakfast Topic: The warm glow of another person's accomplishments

So last night my wife and I ran ICC10 heroic to get her the last couple of achievements she needed for her Bloodbathed Frostbrook Vanquisher. They were fairly annoying achievements. Full House and Portal Jockey, to be exact. But thanks to her keeping track of the adds and a solid plan for Dreamwalker, we finally got them done and she got her mount.

For some reason I only like achievements when other people get them. I don't always like the work of doing them - I hate Portal Jockey and I'm not looking forward to trying Been Waiting a Long Time For This on 25 next week to get her the other mount, but I'm still glad to help - I like that we can do this stuff together, and I really like the feeling I get when I help someone else achieve a long held goal of theirs. It's satisfying.

So I'm asking you for your stories of achievements you aided others in getting. Doesn't have to actually be an achiement - did you help a guildie get Shadowmourne or Val'anyr, did you run them through the Timeless Isle for chests, did you grind for bones on the Isle of Giants with them? Just any story of helping out a friend or other player will do.