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