This happened to me a few days ago and I been waiting for the chance to post it, glad that I finally have a few spare moments to waste here on Alla when I should be doing work.
I was on my pvp alt (29 hunter *BOO! HISS!*) when I noticed that someone was shouting they needed a tank for OHB, recalling that I still needed a few drops from there (the ring off the liuetenant and the body armor off of the captain) I decided to bust out my paladin and give it a go. The party setup was me (prot spec pallie), warlock, mage, rogue, and my healer was a holy spec pallie.
Things went exceptionally smooth for the whole run, with the succubus, a rogue, and a mage CC was abundant so the pulls were remarkably easy (marked a mob for sap, seduce, and polymorph) and we did not even have a near wipe. We were doing fine though we struggled at the part where you rescue Thrall and he simply charges in to all the groups, not giving you a chance to rest and recover, but with coordination and our CC we kept things under control and down the Captain with no trouble.
We get to Tarren Mills, smooth sailing until we reach the Epoch Hunter. For those that are unfamiliar with the instance, you fight waves of dragonkin and right after the boss attacks you. A bit of lag caught us though in the last wave before boss, I go down, the rest of the group and Thrall manage to take down all of the Dragonkin and the pallie immediately rezzes me as the last mob goes down. I run in to the church to try and get as much mana as I can before the boss comes down. I start eating and drinking, wishing my hp/mana bar would go up faster. Thrall is holding his own until the Lock pulls hate and gets her face eaten off, cursing to myself I run to the boss with only 3/4 health and mana and use righteous defense and holy shield and then Judge SoR to get threat back, it works and I manage to hold him, the rogue gets caught in his breath attack and then he goes down, the Epoch hunter does his knockback before I could judge SoR and for a few seconds the mage pulls threat and is also eaten.
So then it's just me, Thrall, and the other Holy Paladin. The Epoch hunter is swinging at me, I am watching his HP bar and doing what I can to hold threat while the other pallie keeps me alive, to ease his burden I need to heal myself as well. Both our mana is near gone and I get at 1%, BOOM, lay on hands myself so I am back up to full and that gives me the mana for another holy light. I noticed then that my healer kept getting a weird DoT on himself and a short time later he goes down with the Epoch Hunter at 5%. I am watching my mana at this point, getting holy light off when I can, 4%... 3%... 2%... Holy light... his hp is still going down, we are both at 1%, BOOM, Divine Shield, the Epoch hunter turns to Thrall, me and him are swinging, I don't even have the mana for another heal and forgot to bring any bandages, Shield timer, 4... 3... 2... 1... BOOM! Thrall gets the final hit and the monster dies.
I can say honestly, my group was shocked and didn't believe I managed to pull it off... hell I can't believe I pulled it off. I was just glad Thrall was there for the constant DPS and the killing blow which he has to have anyway. So yeah, that was my story, just wanted to share it, probably gonna go back tonight to get that tanking ring.
Any other close calls to share?