In Houston, Texas, a man came into a convenience store with two guns and announced to Wazir Jiwi, who was the only clerk there, that he wanted cash. Mr. Jiwi offered to buy one gun, since the robber only needed one. They worked out a deal for $100, while the clerk pressed a silent alarm button which also locked the front door. The robber offered to abort the robbery if the clerk would unlock the door before the police arrived. And so, the robber escaped. As it turns out, the clerk ended up keeping his $100 and the gun.