I just had my...let's see, this is either my 5th or my 6th...colonoscopy yesterday. Three very tiny polyps removed, awaiting the biopsy to find out if they are pre-cancerous, or just non-cancerous anomalies like the few that were removed last time. I gotta say, while it might not be the most fun you can have with a video camera and a greased sphincter, it's definitely the least time- and quality-of-life-consuming medical procedure I've ever been subject to: ~24 hours of annoying discomfort, 1 hour of excellent drug-induced sleep, a few minutes signing discharge paperwork, and you're back in business for another 2-5 years.