When Lee Soo Geun asked who Kangnam would like to pair up with, he answered, "I want to team up with gamginam noona." It seems he was referring to film 'The Scent' (Ganginam) which Park Si Yeon starred in.
Hearing this, Leeteuk corrected him saying, "It's Ganginam, not gamginam." With that, Kangnam replied, "Oh is it?"
Boom then added, "What is it flu season?" as gamgi means 'cold' in Korean, causing much laughter.