I can't remember the dungeons name, but it was the one with the flying eyeball that patrols the caves and AOEs all over the place. I warned the group it was my first time tanking it, and the first thing out of someone's mouth was "lol no AF gear"... The mood is set, and it just continued getting worse throughout the dungeon, even though we were still doing half decently. I finally couldn't take it anymore and left 75% of the way through the end boss fight. Was also the end of me tanking for a few months...