I worked for an obstetrician once and he said the best infertility treatment was to tell a woman she can't become pregnant and look as if you really mean it. He says every time he told someone that she'd come back pregnant in a few weeks.
There is a safer cure for hiccups - no need to shock someone so much she has a stroke, heart attack or bursts her vocal cords!!
Take a few sips of water and swallow them. Then bend forward at the waist til your torso and hips & legs are at a right angle. Take a mouthful of water and swallow. Two or three mouthfuls of water usually stops hiccups. - The slight pressure of water on the diaphragm in the changed position
will usually stop the little diaphragm spasms we call hiccups.
Hope both these little tips help. I expect to hear of a bunch of new grands in a few months, an not to hear any more hiccups
Nana Nurse