I'm not sure if this is normal or not. In Crucible I have noticed that I'll shoot someone they'll run away then I get the kill and head shot shortly after I'll die from them. This happens on a frequent basis where I'll kill someone then somehow after their death they've managed to punch/stab/force push me to death. Could be a bug or perhaps it's just the game play.. I have had one friend notice the same thing with him. Anybody else?