SAN & Yang Se Chan’s minds go completely blank under the 3-second timer! #fyp #runningman #yujaeseok #yoojaeseok #kimjongkook #haha #yangsechan #songjihyo #jiseokjin #jisukjin #jiyeeun #hanjieun #san #kvariety #kvarietyshow #koreanvarietyshow #koreanvariety #kocowa