What is the rabbit punch? A rabbit punch is a blow to the back of the head or to the base of the skull. It is considered especially dangerous because it can damage the cervical vertebrae and subsequently the spinal cord, which may lead to serious and irreparable spinal cord injury. A rabbit punch can also detach the victim's brain from the brain stem, which can kill instantly 
A rabbit punch is a punch aimed at the back of the head or base of the skull. It is known as a rabbit punch as it is used by hunters of rabbits who kill their catch by delivering a blow to the back of the head. In the heat of a moment, a rabbit punch can be delivered by accident should the opponent move their head in such a way that changes the position and therefore target landing of the strike already been thrown. However, any rabbit punches seen as being deliberate will usually cause the referee to intervene (providing a good referee who has spotted the punch!).
The rabbit punch is one of the most dangerous blows in boxing. This term originates from a method used to kill trapped or injured rabbits. Rabbit punching has similar effects on Humans, potentially resulting in unconsciousness, severe injuries and death. Penalties for rabbit punching depend on the offending boxer's intent and whether the blow leads to injury