(WuMo)
If you get the joke in this cartoon, then you likely have seen the 1960 film Spartacus starring Kirk Douglas in the title role and Tony Curtis as his loyal friend and ally, that was directed by Stanley Kubrick with the screenplay by Dalton Trumbo.
Here is the scene.
Trumbo had been blacklisted during the McCarthy era because he had refused to provide names to the congressional committees seeking to identify Communists working in Hollywood and it is assumed that this scene was designed to praise those who refused to betray their friends and colleagues.
The scene has become iconic and I assumed that it had seeped into the popular culture by now so that at least people of my generation would know of it. But it is not the case. I once told a story to a couple my age of a person who would give his name as Spartacus to the baristas at coffee shops so that when they called out his name, he could stand and say, “I am Spartacus!”
My friends had blank looks which told me that they had no idea what the point of my story was so I had to explain it to them, which of course ruins any humor.