This is just a cool combo for tuff like your RHG quickly killing weak characters the combo is: Run up then kick, grab the enemy's arm, break the arm and then kick it away, kick to the head, elbow hit, knee to the head, and finally snap the neck.
Here is an example: https://www.youtube.com/watch?v=NJpAw3B1N48
;)Thank you for your time!;)