Limited Invulnerability Potion

As of 2.1:
As stated in the Tool Tip the new effect of this pot is "Reduces physical damage taken by 120 for 8 sec."

It no longer lends itself to dropping aggro.

Fantastic potion for Pali tanks during those large AoE pulls in BC raids.

I use these potions in Phase 3 of Nefarion in BWL. A pally can also assign BoP to each mage but pallies are also needed across the room to heal the tank.

Also, these are great to use when you gain aggro on a fight where gaining aggro could wipe the raid.