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. 

SEE ALSO: Kang Ji Yong, Kwon Eun Bi's cousin and recent 'Divorce Camp' cast member, dies at 36

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."