(1) kicks and knees to a grounded opponent where allowed and (2) 12 to 6 elbows and other strikes to the back of the head and the vertebral column were allowed? I was watching Roberts vs Nash, and near the end of Rd1, Nash was just lying on top of Roberts, who was sitting up against the fence, and I noticed that Roberts hands were free, and he could be smashing elbows on Nash's vertebral column and the back of his head and neck. Usually strikes from the bottom are not that powerful, but in the position, Roberts had enough space to really do damage. It made me think, Roberts could lose the fight, just because Nash is laying on top of him, but if strikes to the back of the head and spine were allowed, there is NO WAY in hell that Nash would have been happy staying in that position. MMA rules make grappling more efficient that it actually is. There are many position were grapplers are super vulnerable, but they are happy staying in those position, because the rules protect them.