The MBC entertainment programs "Infinite Challenge" member Haha shared his thoughts on the speed racer episode of the program, which aired last weekend. 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. Haha shared that afternoon on his Twitter, "I thank all of the mentors, staff members, and mechanics who suffered with us for the past five months, and sponsors, athletes and fans." On this day's episode, the Infinite Challenge members attended the KSF car race, but did not succeed in completing the race, due to unfortunate collision accidents. 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.