Big Nate by Lincoln Peirce for November 28, 1992
The continuing adventures of... Dr. Cesspool! Nurse: You were brilliant today in surgery, Doctor! Dr. Cesspool: Thank you, nurse! You know, every time I operate an someone, I'm reminded of the time I face major surgery! Nurse: You, doctor? Dr. Cesspool: Yup! Very few people know this, nurse, but as a child I suffered a near-fatal head injury! My skull is now one-half steel!! Nurse: I...I'm sorry, Doctor! Dr. Cesspool: Hey, don't be! It's a great place to keep magnets!