Had a rather interesting pickup group the other day. It was heroic Blackrock Caverns.
I zoned in and joined Tank1, Dps1, Dps2, and Dps3. They were all from the same guild. We kill the first boss, good group, all DPS over 9k. I'm thinking it will be a quick clean run.
Then Tank1 leaves the group. Tank2 joins from LFD. Then Dps1, Dps2, and Dps3 leave as well. They are replaced by Dps4, Dps5, and Dps6.
I'm not really certain what's going on, but we continue on to Corla. We wipe once, because it's Dps4's first time with the beams, and he screws up. Dps5 and Dps6 leave the group, and are replaced with Dps7 and Dps8.
We kill Corla cleanly and move on. We wipe once on Karsh Steelbender, I think because the tank didn't pull the boss out of the fire fast enough. Tank2 leaves, followed by Dps7 and Dps8.
Tank3 joins along with Dps9 and Dps10. We kill Karsh Steelbender, and then kill the end boss, skipping Beauty.
It was a really odd run. There were only two wipes, one per boss, so it wasn't like a wipefest. Yet I went through 3 tanks and 10 dps to complete that run.