An acquaintance of my wife's had somebody run up to him and point to a house a few doors away, saying "My friend has been stabbed! He needs help!" The acquaintance ran to the location expecting to find the victim in distress. Not only did he find the victim, he found the knife-wielding assailant still there. The assailant waved the knife at him and told him to mind his own business. The acquaintance was unarmed, but is a Desert Storm vet and also knows some martial arts. He attempted to disarm the assailant without hurting him using his martial arts training. He was successful at disarming the assailant without being injured himself, but he's now disappointed in himself for severely dislocating the guy's shoulder. He's been told that the assailant is lucky it wasn't someone with a CHL or the police that responded, or he'd probably be dead. He still thinks he used too much force. So the question is, without any warning that the perp was still there, would you have gone to help unarmed? What would you have done upon discovering the perp still there? If you were armed, how would this scenario have played out for you?