i think if you jz drink more water during that moment, small portion, little by little...公仔箱論壇* z+ S0 \3 K: W
or you can try to hold your breath and try to inflate your abdomen( make your stomach bigger with mouth closed)公仔箱論壇0 a: ?# \+ C. b( R) M+ v
i tried all above method and they helped....