So, I'm not sure if this is intended or not, but when I play shaman in horrific visions, I ended up burning my cheat death from the horrific visions on one of the bosses in orgrimmar, then when I faced thrall his cry of the void killed me and the vision ended., but shaman has the reincarnation spell which supposedly allows me to resurrect after dying.

Note that I'm dying from damage (health reaches 0), not from sanity drain.

I did not have the chance to test with warlock rez using soulstone if it would proc in horrific visions or not.