A grounded fighter is defined as: Any part of the body, other than a single hand and soles of the feet touching the fighting area floor. To be grounded, both hands palm/fist down, and/or any other body part must be touching the fighting area floor. A single knee, arm, makes the fighter grounded without having to have any other body part in touch with the fighting area floor. At this time, kicks or knees to the head will not be allowed. (Emphasis mine)