"I don't know what hit me, but it one shotted me."

The words of a pug paladin healer when Pos was leveling up in Mana Tombs.

This was on a 3 pull, Pos was practicing holding aggro on multi's, I was 68 or 69, and well overgeared for the instance.

I know none of the mobs killed him.

How do I know? Pos had Divine Intervention on.

Yep. He killed himself.

I tried to explain what happened to the pally (this was like the 3rd pull in the instance), only to find out, on the final boss, that the pally had no idea what Divine Intervention does.

So, yep. We wiped twice.

Both times because the healer cast Divine Intervention on the main tank, while everyone was alive.