We all know that in outlands, high level instances like BT and Hyjal can only permit 25
raiders and if more will enter the portal when all 25 are in, it will says "instance full". Same also to 5 man dungeon like in hellfire and terrokar.
There is a trick here to let all 40 inside. First, when all 25 raiders are inside, and you have invited reserves already, make all 15 raiders who are in the portal dead, then release their corpse. When they released it, all those reserves can already enter, while those who released their corpse cant enter if those 15 reserves are already inside. What the raid will do is when all reserves are inside , let all those who can resu, resu those dead. Viola. You are inside the protal now.
Have fun killing ikiss with 40 nerds.