Reminds me of my first dungeon as a DRK. I was still getting used to the skills.
I never lost hate, never died, and I thought we were moving at a good pace.

But after the 2nd boss, two of the players, who I assumed join together, randomly said "Sorry" and left at the same time. The healer, who stayed, was like "What!? Why did they leave??"
I'm assuming it was because I was in my tank stance the entire time.
I never knew I should switch in an out. After that I asked around to find out why they would leave, and found out I should have not been using my tank stance. /shrug

Still, two new DPS joined right away, we finished without incident, and I got 2 player comms.