I had an afk healer the other day. I was almost certain he was dying intentionally at the start (not only was he not moving out of aoe, he seemed to be running for it...), I'd blow swift cast to raise him, and he wouldnt get up until after the fights were over. By the first boss he wasn't even moving anymore, I think at one point he said he had to go out but didnt leave group, though I saw him move his character on the map while he was supposedly not there. I had to heal the whole dungeon on my own.