I had a good one as WAR last night.

Doing CT, at the beginning when you have the Homunculus and the shadow dragons. I jumped out of the poison pool after finishing off the homunculus and started wailing on the dragon in DD mode (I was OT). I kept expecting the dragon to spin around, because the main tank was originally behind me. His ass was pointed right at the party. Waiting and wailing, waiting and wailing. "Damn, wheres the MT at?! I'd better tank him and turn him!" I popped on defiance anTAILSWIPE. Too late. Half my group got taken out including both healers.

It was only then that I looked up and saw the MT had D/Ced. I was MTing and didn't know it, and dragon ass-blasted my own party! >.<