In August 13 aired episode of SBS 'Running Man', Yoona and Song Ji-hyo had to give out three answers to a particular question.
One question they received was, "What are the three moments you didn't like about Kwang-soo?"
Yoona answered, "When he's eating, sleeping, and taking a shower."
Immediately Running Man members poked fun at Yoona, "When Kwang-soo's sleeping?".
Then Kwang-soo blushed and said, " When did you see me washing?" and everyone burst into laughter.
(Credit = SBS Running Man)