Members of the public piled on a 20-year-old man after he threw a woman to the ground, knocking her unconscious in George St.Senior Sergeant Anthony Bond, of Dunedin, said about 2.25am on Saturday morning a 20-year-old man threw a 27-year-old woman to the ground after she tried to stop a fight between the man and her husband. The woman hit her head on the ground and lost consciousness. The 20-year-old man was arrested. However, the arrest did not come before onlookers jumped on the 20-year-old man, assaulting him for his role in injuring the woman. In the George St melee, another man kicked the man in the head while he was on the ground.