Recently various online community board posted picture comparing actor Song Joong Ki and Kim Jong Kook's arm. The screenshot from SBS art program 'Running Man' shown Kim Jong Kook capturing Haha and was hug by the waist by Song Joong Ki. It is noticeable that Kim Jong Kook has thick forearm compared to Song Joong Ki. Kim Jong Kook's forearm is nearly three times larger that Song Joong Ki. Netizen commented "I'm shocked.." and "Three times? It's shocking".