me too. 4get, I stood the tube down my throat then panicked and got them to pull it out. They were really cross, like they'd never had a nervous patient before. If I do it again it'll be with some sort of sedation. I had a colposcopy recently, mildly uncomfortable (especially as they were showing me on a screen what they could see!) but actually much less upsetting than the throat version.
I just sat there for the throat one, lay on my side for the bum one, no strapping needed.