Funny story for you all. My hiccups are severe - they're rarely more than 3 in a row and usually occur in isolation (unless I'm really drunk when I sometimes get normal human hiccups) but they scare people. They aren't painful, most of the time, but I've been described as sounding like a donkey, pig, vulture, pterodactyl and dragon; like the demon inside me is trying to escape but is still trapped by the filth in my lungs from years of abuse and many creative lines from my friends once they're used to them. They really embarrassing too - I can't count how many times I've been walking down the street and started that little flirtatious eye dance with a lady as I pass, gone to smile and suddenl--SCCRRAAAAAWWWKK!
Today I hiccuped and it hurt a lot. I thought nothing of it but started coughing a bit and my throat felt really itchy, as if something was trapped. I figured it would eventually get coughed up or swallowed. I tried drinking some fluids, eating a chocolate bar and coughing periodically - not that I could really stop myself from doing so. Eventually, after four or so hours of if it getting progressively worse, I took myself to the emergency ward. There's nothing trapped, but I did inhale something which has cut my tonsil open, resulting in it hanging wrongly and touching the back of my throat at random intervals creating the sensation of something trapped in there.
EDIT: It never occurred to me that nicotine could cause hiccups - I started smoking so young that even though I'm only in my early twenties I can't really remember not smoking, apart from the last year or so of vaping.