This was actually said in court & is taken from a transcript
Lawyer: Doctor, before you performed autopsy did you check for a pulse?
Lawyer: Did you check for blood pressure?
Lawyer: Did you check for breathing?
Lawyer: So it is possible that the patient was alive when you began the autopsy?
Lawyer: How can you be so sure Doctor?
Doctor: Because his brain was sitting on my desk in a jar
Lawyer: But could the patient have still been alive nevertheless?
Doctor: Yes, it is possible that he could have been alive & practicing law somewhere!