Auscultation marks

I am studying for the Dutch Urology Board Exam. It is due in three weeks, and I already spent a fair amount of time on leisurely reading. Now comes a phase of cramming - reading it over and over again until you can't stomach it any more. However, this gives rise to weird creativity. Some time ago, in an aged lecture-hall in London, GB, a faint student scribbling on the desk read "Hit me with your stethoscope until the auscultation marks bleed".