I just think it's mostly psychological. I don't stand on my head and drink warm milk with white pepper when I get a nervous twitch in one of my fingers, toes, or a thigh muscle, etc. I just move which ever muscle is causing the problem and it stops.
You can't easily do that with your diaphragm though, and people mistakenly believe that risking choking yourself solves the problem when you force peristalsis to work against gravity. It's mental.
(, Tue 6 Jan 2009, 13:25, Reply)