The cast were dressed in wetsuits as they prepared for river tubing at the Kalisuci cave, which is a river cave. Shindong, who is afraid of moving water, was determined to face his fear despite the cast assuring him that it is okay to opt out of the activity. Shindong took the lead in tubing after a short discussion among the cast. They all agreed that Shindong might be afraid to have a go if he saw how the other went ahead of him.