The reason for "no knees and kicks to the head of a downed opponent" is to protect the fighter from extra shots when he is KO. I thought, "ok, that is a reasonable rule," and then I saw a gif of Dan Henderson (one of the DIRTIEST fighters I have ever seen) getting extra shots on Hector Lombard, and he can't forget Michael Bisping and Fedor. All these cases the opponents were out, and Dan Henderson squeezed in some DEVASTATING blows to the head of a downed opponent. So, for the rule of the "downed opponent" to make sense, they need to say "No blows whatsoever" to the head of a downed opponent. Brain damage is brain damage. The opponent's eyes are rolled back and Dan Henderson is squeezing in extra shots with his elbows and fists, you can tell me that, "because he is using his arms it is less dangerous than using his legs, and that's why we have the rule." It is STUPID. haha. Trauma to the brain is trauma to the brain. If the rule was really to protect the fighters, then fighters should NOT be hit on the head with ANY type of strike when they are considered "down." Thoughts. PS To some of you who are going to make it a Dan Henderson "is only following the rules" argument (1) This is not an argument about Dan Henderson, I am just using him as an example because he is the best case of showing why the downed opponent rule is stupid as it stands (2) If Mark Hunt can see that his opponent's eyes have rolled back, and walk away, so should Dan Henderson, because he doesn't, it makes him dirty.