I read this joke, taken from the “Sick Jokes” books published in the ’50s, around 1970. It didn’t make any sense to me at the time:
“Yoo hoo, Mr. Metesky… you forgot your package!”
That was the entire joke. I assumed there must’ve been some famous bomber named “Metesky.” There was no internet in those days, so I actually would’ve had to expend some effort to look it up. I didn’t. Then, years later, I saw an obituary for “George Metesky, infamous mad bomber (from the late ’40s or early ’50s).” Good instincts!