During this week's episode of 'Boat Horn Clenched Fist', Kim Se Jung called former IOI member Kim Do Yeon.
Each member of the program was required to call someone they are close to in order to play a word or phrase guessing game much similar to Catch Phrase. After Kim Do Yeon picked up the phone, they started right away. The second question's answer phrase was "I miss you" in which Kim Se Jung quickly became sentimental.
Kim Se Jung then asked the third question, "What's the tastiest fish with a blue back?" Kim Do Yeon responded, "The eyeballs!" to make the cast of the show laugh and Kim Se Jung was taken back by the answer. She repeated the question and Kim Do Yeon gave the correct answer this time around which was "Mackerel".