Most cons are well planned. After all, the con artists don't want to go to jail.But sometimes, things come together in such a way that the scams have to be pulled off quickly while the con artists make things up on the spot.Today we'll tell you the story of three scams that were run only once. OK, there's a fourth one, but you'll know it when you hear it. Listen closely.The Kitchen Table HistorianLearn more about your ad choices. Visit megaphone.fm/adchoices