It all happened when I was in collapsed prison with Fable, as we headed towards the goblin camp. I had a haarken after me and I ran to the gate since it was close by. I was at half health with him close behind when I went through the gate and saw the warp message in the middle of my screen, but lo and behold I was still alive O_o
It seems it must have done the killing blow as I warped through. After warp timer reached 0 nothing happened, it just disappeared from screen.
*looks around for fresh brains*