Ok so here's my explanation for this: I was running up to the top of an elephant where this girl player that I play with alot was sitting shooting on the turret. I heckled her and said "I GOTCHA" and I ran up behind her and jump throwing a nade and well you can see that she hit me first and right in the metal plating, if you know what I mean. http://www.bungie.net/Forums/posts.aspx?postID=20488039