One of the missions requires me to "brutalize the guard", but for the life of me, I cannot actually perform the move. (Yes, my ranger has developed the "skill") I have an apple keyboard, and a logitech mouse-- the magic mouse being a step too far. When I press "left Alt", or the right mouse button, I just go into the shadow for a bit, as if I'm about to aim my bow. I'm holding down shift, so as to be stealthy. I can't seem to go into that stabby stabby frenzy. I've tried this in both bootcamp and macosx. What's the trick? Besides using a gamepad, I mean.