Hey there! We were doing Tsulong, and we were just getting into it so our DPS/HPS on the boss wasn't optimal. He hit Enrage at 18% HP, kills half of our raid and suddenly drops from 18% to 2% and we won the encounter. I livestreamed this, so here is an archive video.
It happens at 1:05:50
http://en.twitch.tv/andarius/b/341098710
Just curious if someone can tell what happened.