Civilized colonoscopies are done with intravenous diazepam, inducing a dreamlike half sleep which allows you to watch the procedure on the monitor without any discomfort. You don't even feel the insertion.
I can't imagine even being in a highly benzo'd-up state, while having scopes jammed up my ass; whilst being pumped full of air. They totally knock you fuck the out for the procedures here.
Waking up in recovery and letting violent winds rip from my anus, with the staff's blessings, makes me feel unbelievably alive.
Nothing better than that first major fart you let loose after a scoping, but I digress...