United States Air Force Thunderbirds
The cast went through a variety of physically and emotionally taxing missions, usually spanning over 24 hours, performing the likes of serving mandatory military service again, crying, becoming employees of random companies, not smoking for a day, wake-boarding, singing in a choir, participating in an amusement park parade show, and forming an amateur band. The most memorable moment for the program was when 2 of the members (Kim Gook-jin and Kim Sung-min) was selected as a guest for the United States Air Force Thunderbirds Acrobatic Team, during their 2009 Far East Tour at Osan Air Base, in South Korea. For the Choir episodes, both of the Choir teams won awards (with guest Kolleen Park and Kim Tae-won as conductors).