When I had one done around 40 (overdue for a follow-up) the prep was a gallon or so of liquid, that quite indeed turned everything else to liquid over the next couple of hours.

When I was laying on the table conversing with the nurse that had the key to the box with the good candy, i joked that I noticed the scope was marked in meters.

If you find the right doc, you can stay conscious enough to really enjoy it.

Worst part for me - i woke up thirsty and asked for a glass of water. The nurse got me one, I took a few sips, fell back asleep and wore the rest of the contents.