"The first wave must have been 20 to 30 kids," Chae says. "They had pipes and poles, like batons. It happened so fast. I was shocked. They came into the store and started banging against the [bulletproof] Plexiglas that separates the package section from the customer entrance. But one of them, this boy I'd seen before and who calls me, 'Mr. John,' he said, 'I will protect you, Mr. John.' And he pushed some of them out of the store, yelling, 'Hey guys! This is Mr. John! Get out of here!' I have no idea what his name is, but I will see him again one day and I will thank him."