I'm sure everyone has had those times, where you just want to throw your hands in the air and yell "holy ****, this is going to be bad". You know when things go wrong, and everything in front of you is pointing right to impending doom.
Had one of those nights last night. We were running Heroic Old Kingdom. I've ran it 3 times, and never finished the achievement because everyone wanted to skip the mushroom boss.
For those that don't know, the mushroom boss is annoying, spawning a bajillion mushrooms that are good and bad, you need to kill a good mushroom to remove a debuff or something. But none of that is important.
Anyway, things were looking grim from the start. I'm healing like crazy, the DPS are taking massive damage, so I blow shadow fiend very early. Sadly at ~75% the mage in our group goes down. 10% later the druid drops. I have to pot because of the sheer amount of AoE healing I needed to do to try to keep them alive.
At this point I'm thinking, great things are looking bad. The amount of healing needed calms down at this point, becomes more steady and stream line. DK and Tank are not getting hit by the bad mushrooms too much. Things are looking ok and more manageable (only ok because we were down 2 of 3 dps).
I should have knocked on wood, just as quickly as it calmed down, things went haywire again. Tank was taking massive hits, I was spamming GH. My mana was dropping fast again. This was the point at which I wanted to yell "holy **** this is going to be bad".
I'm out of mana, waiting to get just enough mana to cast my last GH. It crits, clearcasting pops, so I begin casting greater heal again, second crit, and surge of light procs. I wait and flash heal the tank. Pop inner focus, cast prayer of healing and get another surge proc. So I flash the tank again. Then cast Gift of the Naaru on the tank.
I looked at my mana bar and had well over a 1/4 of my mana back from that time being out of the 5SR. I laughed to myself and praised about how much I love my priest, and went on healing the rest of the fight.
I wish I could say the rest of the fight went smoothly, but at about 3% the tank died, and I died right along with him. The boss literally had 2k hp left(based of off xperls number which isn't always accurate), while I was in spirit form healing the DK. He was busy running around looking for a healthy mushroom, the tank actually had to type a raid warning telling the DK to hit the boss. He did finally hit him and killed him in one shot.
But after that fight, I was slightly amused with myself about how cool/lucky it was to string those crits and free cast procs long enough to regain that much mana, and save what could have been an easy wipe.