Aimbot, I say again. His crosshair is living its own life; BTW, there's an utterly cool scene @ 00:55 onward
I noticed him when he stood back turned to me and at the very moment I appeared he turned with lightning speed and shot me in the head. Only when I'd started recording I saw his score. 80:10, my donkey...
My demo is somewhat longer, perhaps there's some use for it.