Kim Jong Kook revealed his admiration for his 'Running Man' castmate Yoo Jae Suk on 'Yoo Hee Yeol's Sketchbook'.

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On the January 8th episode of the show, the three members of Turbo featured as guests. Kim Jung Nam talked about his fellow member Kim Jong Kook fondly, saying, "I've always thought this way, but it's hard to climb the ladder. He's younger than me, but he was like a foundation for me. I hope he succeeds more, but I also hope he stays where he is. Then me and Micky can work hard and catch up to him."

Kim Jong Kook responded, jokingly, "I feel the same about Yoo Jae Suk. I hope that he's always healthy, and he stays where he is. I feel the same. I think I know what Kim Jung Nam means."