"On a scale of one to ten, ten being the worst pain you've ever experienced. . . ."
I let the doctor finish, then said "My pain threshold is calibrated on a different scale. This won't hurt."
He signalled to the nurses behind me, and they all put on safety goggles. He said "We have transplant patients who say this is the worst pain of their lives. They're tough nuts, but they feel it."
I shrugged, and strapped on my own pair of safety goggles. "Uh huh."