Best and quickest way to get this game breaking exploit fixed is to bring it to light.
Originally posted by Doso:
Since I can't write a support ticket about this issue I guess i have to make it public.
edited out steps now that Blizz has become aware of the situation
Result: Character becomes Invulerable. No health loss at all, some effects like frozen don't work anymore.
Works in Softcore and in Hardcore. Needs a couple of tries to get it working, but once you have the timing it can easily be reproduced. This is pretty much gamebreaking, I hope to see a hotfix soon.
Dont believe me? Watch this streamer here take no damage tanking multiple elites