Are orthopaedic surgeons gorillas?

pointing at the mouse, shouted triumphantly, 'There it is!' Order having been restored by catching the mouse, the surgeon advanced once more towards the operating table. In doing so he struck his head violently against the rim of the operating lamp, not noticing that it had been placed somewhat lower than usual. He collapsed on to the floor, briefly concussed, and the patient sat up again, gazing in bewilderment at the dead mouse and the unconscious surgeon!"