Me and my friend are leveling DK's both of us unholy for some massive aoe grinding
Well we found out a nice little bug, if one of us dies, we target their corpse and use the summon ability
This rez's a ghoul from their corpse -- No this is NOT them reviving after death in the 45 sec form
This ghoul isnt your pet, but is controlled by them. This pet doesnt have a timer or a pet bar, its actually their character and they have full control without any sort of time duration.
Now they can either run around and continue questing with their 5 abilities that your pet would normally have, or they can relog, and they will be back to human form.
So basically, you can REZ with a DK
EDIT::
I notice people read about 2 sentences of my post so here im going to summarize it for those with attention spans less than that.
EXPLOIT:: Rez friend --> Player Controlled Ghoul --> Relog --> Normal Form
No this is not working as intented blizzard doesnt want you to be able to simply relog to avoid death walks im sure.