I was in control one time about a year ago and somehow mid game was made invincible and invisible to everybody but 1 guy. I was able to kill people only with stick grenades and nobody could see me even if i was standing in the middle of the map with 4 enemies they would run around like i wasnt even there. There was only 1 guy that was able to see me and we were able to damage eachother normally with primaries but to everyone else it was like i was a ghost. It was really weird and never happened again since.