Super Junior members Kangin and Kyuhyun had some fun going at each other's throats on the May 4 episode of 'Radio Star.'

Kyuhyun, maintaining his 'evil maknae' status, introduced Kangin with the worst lines possible. Even before Kangin got a chance to get a word out, Kyuhyun began his verbal attack, saying, "You went on 'Real Men' but why didn't you join the actual ROK's Reserve Forces?"  and added, "[Kangin] is in charge of accidents within Super Junior. They say he's like a lout so we call him 'Kanglout.'

Kangin retorted, "You better be careful. One of SM's pioneers is here," eyeing Kyuhyun and warning him about getting on the wrong side of Dana.