On the January 24 broadcast of MBC's 'Radio Star', Jackson named the past variety show 'Three Wheels' as the most difficult program he has done. He explained, "It was hard because I was not having a hard time (being kept busy)," and added, "I couldn't work hard even if I wanted to." 

'Three Wheels' with numerous sunbae stars was difficult for Jackson, and the rookie idol at the time received little to no spotlight. 

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To Kim Gu Ra, who was one of the MCs of 'Three Wheels', Jackson said, "Hyung didn't even know if I was dead or alive. I was like dust." To this, Kim Gu Ra responded, "If we allowed Jackson to do everything he wanted to then the recording would've taken about 8 hours", and explained, "I didn't have any power."