Mike that has happened to me many times, sometimes for the whole day, I still get it through some parts of the day or night. Ive said to Keith it almost feels like RIgour Mortis is setting in before you actually die. Its hell, I dont know the cause, but its certainly not nerves. I also feel very faint at the time and sometimes feel like I can hardly breathe, I understand the feeling perfectly, its horrific. Tracy x