The MBC entertainment programs "Infinite Challenge" team leader Yoo Jae Suk cried at the unexpected results of the KSF car race. On the most recent episode of the MBC entertainment programs "Infinite Challenge," which aired on July 19, 2014, the Infinite Challenge members Noh Hong Chul, Ha Ha, Park Myung Soo, Yoo Jae Suk, and Jung Hyung Don challenged themselves to a relay car race at the Korea Speed Festival (KSF) which took place on July 6, 2014. On this day, Yoo Jae Suk got into a collision accident. Previously, Yoo Jae Suk completed the race as the last person of the Infinite Challenge team. At the semifinal round of the car race, Yoo Jae Suk's vehicle malfunctioned and he had a collision accident. When Infinite Challenge member Noh Hong Chul failed to complete the race at the final round, Yoo Jae Suk cried, thinking back on the five months they practiced for the race. The MBC entertainment programs "Infinite Challenge" members have been practicing for a relay car race at the Korea Speed Festival (KSF) which took place on July 6, 2014.