Yeh, I had a CT and I felt like my veins were on fire...and like I had just pissed myself...and I wanted to vomit. It wasn't pleasant.
My spleen was ruptured in a car accident last summer. We were hit by a drunk and the seatbelt no doubt saved my life but also just about killed me.
I had 6 CTs over the next 2 months. 3 in one 24 hour period. I got pretty used to feeling like I was pissing myself. The initial CT, however, I was in so much pain they loaded me up with Dilaudid I was good to go.
I was also only mildly sedated when they went in through my right femoral artery to repair my spleen. It was the most uncomfortable 2-3 hours of my life as I had to repeatedly holy my breath as they were placing the metal screws (to help clot) and burning some of the remaining blood vessels. The definite worst part was when that old stork of a nurse shaved my balls and then laughed at me because it both tickled and hurt my spleen more than anything I've ever experienced.
When I had my FIVE wisdom teeth taken out, I was telling the Dr. I donated blood all the time and it was no big de.......zzzzzzz. Edit: I should add that I had a reaction to the anesthesia and woke up puking. It was horrible. I couldn't keep anything down and was too weak to even walk for about 5 days after.