A popular radio announcer, back in the 1940s, was doing 'Man In The Street' interviews, asking people if they knew any 'knock-knock' jokes.
He came upon a drunk. He wasn't sure the guy was sober enough for this, but he asked him anyway: "Sir, we're doing knock-knock jokes today... do you know any knock-knock jokes?"
"Yeah, I know one, " said the drunk. " Knock-knock."
"Who's there?" said the announcer.
"Argo."
"Argo who?"
"Argo duck yourself."
The announcer almost went into cardiac arrest. In the 1940s, OBSCENITIES were strictly forbidden on the air.
He knew he was in trouble. And he was right - - the station immediately fired him!
For 20 years he tried getting back into Radio, but no station would hire him. Finally one day, a new station decided to give him a chance.
And again, he soon found himself back on the street, interviewing people, just like before.
But he wasn't afraid. This time he was prepared. During those 20 years, he'd learned EVERY knock-knock joke in existence, so he was certain that nothing like that could ever happen again.
Strangely, he once again came across the same drunk. He was about to walk away when the drunk yelled, "Hey! Ya wanna hear a knock-knock joke?"
The announcer hesitated, but he decided there was nothing to be afraid of. "Sure," he said.
"Knock-knock. "
"Who's there?"
"Harry."
The announcer raced thru his mind, going over every knock-knock joke he'd ever heard. He'd never heard one with "Harry."
Finally, he decided it was safe. "Harry who?"
"Argo duck yourself!"
(And now you know something that very few people know... why in the movie "Argo," they said ARGO DUCK YOURSELF so often, but never explained why. It was all based on that old joke.)