LOL it wasn't a bug, if you or I fall off a cliff we die, it's also normal to avoid damage ie. move away from a grenade, exploiting these facts is not a bug nor is it cheating. Using a lag switch to get the upper hand in crucible is cheating, glitching under the warsat so that you can't take damage is cheating, but convincing the big guy to try cliff diving, that's just outsmarting the A.I.