Isn't it always frustrating when the white masked uruk hai knock you
over and always block your hits? There are a few tricks to it. One is to
let him knock you over and hope that he gets close enough to you so that
you can knock him over while getting up. If you do that, just thrust the
weapon down on him. Another way is to hit him from behind if he is
occupied by something else or if his back is turned to you. Use fierce
attacks when doing that and he'll fall. Then you stab him. The long and
boring way is to shoot him. It will eventually kill him, but you waste a
lot of ammo.