As reported, a criminal armed with a knife entered Ron Busy Corner, a store on the 5700 block of Juniper Bay Road in Horry County, SC, and pressed a knife to the back of the store owner. The store owner and a customer struggled with the robber, while the store owners wife ran to get a pistol. The store owner, his wife, and the customer managed to disarm the robber and hold him at gunpoint until the police arrived to arrest him.
Those opposed to gun rights will often argue that a person who is attacked by a criminal will be unable to get their gun and defend themselves in time. There is plenty of statistical and anecdotal evidence that flatly disproves this unfounded idea, including this very case of self defense. Here, a man had a knife at his back, yet with the help of his wife and a customer, managed to turn the tables on the criminal and hold that attacker until the police arrived. For 2 even more extreme examples of armed citizens managing to get their guns and defend themselves, see this self defense case and this self defense case.