Final answer:
The 1980 comedy movie "Airplane!" listed Adolf Hitler as the "worst boy" in its credits as a joke.
Step-by-step explanation:
The 1980 comedy that listed Adolf Hitler as the "worst boy" in its credits is the movie "Airplane!". This film is known for its satirical humor and parody of disaster movies. The mention of Adolf Hitler as the "worst boy" is an example of the film's use of absurd and exaggerated jokes to generate laughter.