colonoscopy,not far from the truth!

When my "stuff" started in the 80's the doc set me up for a proctoscope exam. I asked him about the instrument. He knew it would hurt so when describing the impliment he mumbled. 1/2" in diameter and 20 centimeters long when mumbled sounds like 1/2" by 27 meters. My knee jerk response was, " Are you out of your f......... mind ? "