grrr, this happens with tennis and DB

[RaGe*NL*]

look at the image, as soon as i move my mouse this covers my entire screen.. naais, it makes me lag, the fps drops and i cant play , w00h00 , on DB i dont always have the problem m, only on cube with high settings and i dont play that. But i do have the problem on the tennisstadium with low graphics and with high
HELP ME DAVID OR FIZZY