If you had a copy of what he saw on his screen to compare to what you saw you would have your answer.

Yeah this game is BS sometimes with the lag. Last night had a guy run through my bouncing betty, but he had stalker so I just got a hit marker from the BB, so get the hit marker from that, then pump 5-6 rounds into him with good hit markeres and he just waltzes through all that and knifes me. Total crap and this has been happening since day 1 with this game. I hope for all the fanboy sheep that buy BLOPS2 that they will have fixed this problem. Also noticed alot lately with my MSR I'll get head shot/upper torso hits with either no hitmarker/kill or get a hitmarker and no kill when it should be a 1-shot.