i think if you jz drink more water during that moment, small portion, little by little...5 J3 d% s; c% F$ Y' K# \! I# u
or you can try to hold your breath and try to inflate your abdomen( make your stomach bigger with mouth closed) ) x1 L0 }( D0 i; q# A9 _$ {公仔箱論壇i tried all above method and they helped....