Brutal Kicking Workout

The slave will have to assist me today - I want to improve my kicking abilities and therefore order him to stand in front of me - so I can kick his assets - with my brutal trailrunning boots! I know the vicious tread of the shoes will hurt him massively and each kick leaves behind a nice imprint on his skin. I mix in some knee kicks and order him to get back up after each kick quickly. When he doesnt get up quickly enough, he has to get down on all fours and I kick his belly from below! When he isnt even able to get back on all fours, I just kick him over and trample him for a little while - until hes getting up again. Later I take off the shoes and continue to kick him with my bare feet.