Reading this brought up the grab kills in Prince of Persia: Warrior Within for me. I remember them being cool the first time and done in slow motion, but as the game wore on I'm pretty sure they stopped showing them in slow motion. This was a pretty good balance as I never got tired of them seeing as I only saw them once in slow motion and after that they were just quick and brutal. The speed kills in Two Thrones made me happier though seeing as I enjoyed the platforming more than the fighting and they created stealth obstacles in addtion to the normal Prince of Persia routine.