Cartoon of Dr. Akio Awa with "devil" Dr. Hamilton, and the cartoon is a display of dark humor. When the characters in the cartoons are up to no good, they are usually depicted with horns and fangs. This is probably a hyperbole of the sentiment, "You're killing me!"

Cartoon of Dr. Howard B. Hamilton swinging dangerously in a tree while Dr. Awa wears Dr. Hamilton's bow tie.