I've recently discovered on my 3rd playthrough that if you attack a NPC from the front but instead of a normal hop, use the chain link, then you will actually gain health as if you'd attacked him from behind. It also seems that you are able to do any kind of chain-hop without taking damage when an enemy faces you. This seems rather silly and broken to me as it completely screws over the stealth aspect of having to stay out of peoples vision.
I hope it can be fixed soon
