SEE ALSO: Former Wonder Girls' Sohee stuns fans with her mature new look

Hong Suk Chun surprised the regular members of the program when he appeared as the surprise guest to challenge them in a swimming triathlon. The actor revealed that he is a big fan... of CNBLUE's Minhyuk, confessing, "I watched all the episodes of 'Our Neighborhood Arts and Physical Education.' I'm a fan of Minhyuk so I wanted to see how well he did."�

He suddenly turned to Minhyuk to yell, "You're not any better! You were so determined to get better but how come you haven't improved at all?" Minhyuk, clearly flustered at Hong Suk Chun's sudden outburst, strung an excuse together. The drummer managed to blubber, "The time [it takes to swim the triathlon] has decreased. I just haven't won yet," bringing laughter.�

Watch the hilarious exchange below!�