it started off as a mild ache in my stomach that grew to a feeling if nausea. Then I started to get waves of cramps. I was trying to throw up, but I couldn't (the old salty water trick helped). I soon began rolling around in complete agony, my stomach and back muscles in spasms. I told the wife to call me an ambulance if it didn't get better soon.
And then within half an hour it slowly, then completely eased off!