An entitled customer, who the OP claims was a total Kevin, got instant karma when he tried to make the innocent retail employees' lives miserable over a return. In the following story, 'Kevin' would not accept the store's policy of in-store credit refund for his item. So, he decided to cause a scene for the poor employees on shift who don't even have a say in the store's policy. So, whether Kevin blew up or not, there wasn't anything they could do about it.