> Myself I have an unusual genetic condition, so I unlike normal people, I do a colonoscopy every year. I stay awake and watch the monitor, because I actually want to see what I look like inside. At the end when you reach the small intestine, the cilia on the walls inside there are quite fascinating.

Same here, but I stopped watching the monitors; I just watch a movie on my phone; makes it go (much) quicker for me => I hardly notice anything if the movie (or tv show) is good.