uhh just get a new mouse works for me :D
if on a mac dont go in full screen and put ur sensitivity on 0.6 and shake ur mouse up and down really fast and go up really fast and try to go down at normal speed and ur crusor will get stuck in the middle of the screen :D
if on a mac dont go in full screen and put ur sensitivity on 0.6 and shake ur mouse up and down really fast and go up really fast and try to go down at normal speed and ur crusor will get stuck in the middle of the screen :D