Same. Had one under light sedation a few years ago (switched to biannual stool screening for occult blood subsequently) and I'd say the discomfort was similar l

Same. Had one under light sedation a few years ago (switched to biannual stool screening for occult blood subsequently) and I'd say the discomfort was similar level to having a tooth filled under local anaesthesia. Not fun, occasional moments of mild discomfort, outweighed by the novelty/this is cool factor of getting to see the inside of my own guts. I will note that general anaesthesia generates lots of extra billable hours (anaesthetist! extra nurse/assistant anaesthetists!), which might be why US hospitals are so keen on it and NHS hospitals are less so.