On the November 4 installment of 'Knowing Brothers', the Super Junior members appeared as guests, and Yesung brought up an issue he had with Kang Ho Dong. During his QnA segment, he asked the panel, "I'm so afraid of Kang Ho Dong that I can't even visit Chunho-dong or Geumho-dong. What happened that made it this way?"
Yesung then revealed it was because during a past appearance on SBS' 'Star King', Kang Ho Dong yelled, "Can you stay quiet," at him when he tried to be more assertive on the show. Kang Ho Dong was embarrassed by the story and left the 'Knowing Brothers' classroom only to return as his "twin" with a big mole on his face.
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