Anyways, this is short and simple.
I'm pretty sure this is a bug because it is pretty unfair

But anyways, being an Unholy spec'd Death Knight you get the opportunity to return to life as a Ghoul upon death. And just the other day I was bumming around Hellfire Citadel with my cousin's Death Knight and I got ganked by some Alliance (go figure...haha jk) anyways, they killed me and I transformed into a ghoul, so I quickly ran into Ramparts just to see what would happen and shazam! I was back to my original self, full hp and everything, no corpse run, no nothing...just back to life...So yea, it's pretty easy, and pretty cool. You guys can test this out yourself and see.