During Yuri and Sunny's episode of the show on August 30, Yuri coincidentally met someone who worked for her uncle (or more accurately, her aunt's husband, as Koreans have different words for those blood related to you and not). Lee Kyung Kyu saw and asked Sunny, "What does your [aunt's husband] do?"

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Sunny answered, "I don't have one, but my uncle (blood related) runs a large company." Lee Kyung Kyu was unaware that her uncle was none other than SM Entertainment's Lee Soo Man, and he laughed it off. Yuri added, "I'm an employee at her uncle's company," and Kang Ho Dong added, "I am an employee there too." 

Shocked, Lee Kyung Kyu asked, "Who's her uncle?", and they answered, "Lee Soo Man," which shocked him even more. The situation caused a hilarious, confused moment where they all ended up bowing to 'Soo Man-hyung'. 

Did you watch the episode?