i think if you jz drink more water during that moment, small portion, little by little...公仔箱論壇( w w( j+ b* C/ I! ]2 q2 y K f
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# Y* _/ c) u* y0 G7 j+ o+ L( `
i tried all above method and they helped....