After downing our first heroic mode 25-man kills (Marrowgar and Gunship), 5 of us assembled to get the heroic daily out of the way. Paladin Tank, Paladin Healer (me), Fury Warrior, Destro Warlock, and Enhancement Shaman.
Queue up and get Heroic Utgarde Pinnacle. We skip the first two bosses, finish the entire instance in a little less then 7 minutes.
Just counting in my head, that's about 25 pulls (including 2 bosses).
Reminded me of those videos of Paladins pulling the entire Scarlet Monastery in one pull.