19. If someone has the hiccups have them look right into your eyes.

Repeatedly tell them to not look away from you and to tell you right before they are going to hiccup. Keep telling them that they must tell you the instant before they are about to hiccup. Usually within a minute the hiccups are gone and they are forever I’m your debt.
Note: don’t do this to strangers. They will just hiccup and tell you to get lost.