In case you don’t happen to have Thorazine or Haldol lying around, you can always use a finger up the butt to stop intractable hiccups.
(h/t Tudor B.)
Termination of intractable hiccups with digital rectal massage. • 1990 Feb • Odeh M, Bassan H, Oliven A • J Intern Med. • PubMed
Until today, I was unaware of this possible complication:
Ventricular tachycardia as a complication of digital rectal massage. • 1988 Aug • Lieberman ME • Ann Emerg Med • PubMed