Minor or potential big, you decide
You know that you cant pickup quest-items (etc) when you are in a raid and that sometimes it s*cks, wanting to phase through different instances now with the help of the groupfinder and you land in a raid-grp and the desired item is infront of you?
For example the 10x Apexis Shard quests, easily done via this method.
And do you remember that when a mob attacks you and you leave the group you used for this phasing, you remain in the phased zone until you are out of combat, right?
This is how it works:
When you (accidentally) join a raid, you engange a mob, leave the raid and by being infight still remain in that phased instance, cc the mob and loot your item. It now counts toward the quest-goal.
Enjoy