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.' 

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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.