It's been a couple of years since my last colonoscopy; as I recall, they gave me stuff to take the night before through both ends: that nasty drink from the top down, and a suppository from the bottom up.

The "twilight sleep" anesthetic didn't put me completely under, and I was able to remember all or most of what happened. It did put me into a very relaxed state wherein I could barely feel the (very invasive) procedure, and didn't care at all. I remember watching live video of a trip up my nether regions; very strange!

The nurse/anesthetist who administered the stuff was a guy about my age. Just before he began, he asked how long I had been living in town; when I told him "over 30 years," he responded, "Then I know you've been to The Warehouse, right?" (That was the main rock venue in New Orleans back in the late 60s / early 70s). As the drug began to take effect, he asked, "See the Allman Brothers coming out on stage? Here they go ~ they're opening up with 'Whipping Post'!"