Three doctors were on their way to a convention when their car had a flat. They got out and examined the tire. The first doctor said, "I think it’s flat."

The old family physician being away on vacation, entrusted his practice to his son--a recent medical student. When the old man returned, the youngster told him among other things, that he cured Miss Ferguson, an aged and wealthy spinster, of her chronic indigestion.

"I was under the care of a couple of medical students who couldn't diagnose a decapitation."
Jeffrey Bernard

An Irish surgeon who had couched a cataract and restored the sight of a poor woman in Dublin, observed in her case what he deemed a phenomenon in optics; on which he called together his professional brethren, declaring himself unequal to the solution.