The only trick that worked for me was this.
Had been hiccuping for probably 5 minutes. Nothing working. Someone came up to me and just said “hiccup for me now” just waited for that hiccup. Kept asking for me to hiccup for maybe 30 seconds to a minute. Gone. No more hiccups.
“Cheer up, it may never happen”
I’m sorry but if I’m not in a good mood or I’m sad it’s because something has happened to make me feel like it.