T? m?i ???c th? hi?n qua nh?ng hình ?nh sinh ??ng, ví d? g?n g?i vì th? t?ng kh? n?ng Hello?u c?ng nh? ghi nh? c?a tr?.I need to know about some gesture of U.S. I observed this gesture while in the "Pals". In certain episode, Joey put hand on his forehead, and he stretch only two fingers that is thumb and 2nd finger. Could you reveal for me? p.s