I just saw this recent article on the scientific portal PubMed on a new way to treat hiccups: "Termination of intractable hiccups with digital rectal massage" Loosely translated, this research implies that as an added bonus your proctologist can now treat your hiccups. Trust me I'm a doctor: New cure for the hiccups.

Personally, I'll stick to trying to hold my breath to cure hiccups. I'm glad I'm an experimental physicist as opposed to an experimental biologist.