Billy and Adam try to figure out what makes a fad. Why do things spring into popularity one moment and disappear the next? And what kind of impact do they have long term? In this episode, Billy and Adam take a look back at Tamagochi, Pogs, Gangnam Style, Egg Salad and more to try and identify the reasons for their success. Plus, Billy's trip to Greece, public flubs and music by Leonard Cohen! Theme: Send Medicine - Way to the Sea