Pls. comment if u ever had this happening at any op.: We were at a normal classic op, about 3 or 4 guys battling as usual...suddenly a tanx joins..I pinpoint 4 shooting at it and its nick was ????. Surprise..ammo just went thru it as shooting thin air, I rammed him and we became 1 at a given time and just went thru him also. I ask the other players and many noticed it too..He stood there with no movement or shooting back but was kind strange seeing such thing as rare as this.., All at the ops. noticed it, no 1 had explanation 4 it...Any hints?