Hearthstone flesheating ghoul bug

First of all, sorry for facebook sounds. By accident i've discovered in taverns brawl that Ghoul got stacks after using feign death. I've tried to test it a little bit with friend, and we found few things out. Check the vid out for the results. Also, theres possibility that it doesn't have to be hat, maybe just any deathrattle on ghoul, sadly, to test it I would need some Lorewalker Cho + ancestral spirit combos, Spellslinger RNG or other stuff, which I cannot do at the moment.