a few months ago when the first time i saw EXO's performance i thought the same way .. xexexe ... until i ask someone : is that a part of the song ?...n she explained to me that it is a fanchant .. n then i search n start to google what fanchant is n anything related with EXO n EXOL , the songs etc..etc.. n it's so amazing ... awesome ..cannot describe it with words ... daebak ..love you EXO n EXOL...bunch love from Indonesia...