I actually did walk out of the doctor's office once. I was in for a physical and they went to draw blood. First attempt, the vial didn't fill up all the way. The nurse apologized and tried again. Same thing happened. She apologized again, said, "This will be the last time, I promise," and jabbed me a 3rd time. Keep in mind that I *HATE* needles... Again, the vial only filled about halfway. "That's weird, let me try something different." As soon as she said that, I stood up and started walking out. She looked shocked and asked what I was doing. I told her, "You said that was the last time, so I'm leaving."