I went for a colonoscopy yesterday as I had suspected bowel cancer. I sometimes take pride in the fact that I have quite a high pain tolerance but that colonoscopy sent me into a full on panic attack. The pain was indescribable and when I asked him to stop as I couldn't get my breathe, he continue to shove that tube in and pumping air in until the nurse stepped in and asked him to wait. I felt so embarrassed and a bit ashamed of myself for shouting out like that but it was like I had no control over it. Today I am still in quite a bit of discomfort and am seriously thinking of making a complaint. I think the way I described to my Sister was that it was like getting violated by  shire horse!!