Oh that reminded me of one. In the fall of '80, Rolling Stone published a review of John & Oko Lennon’s Double Fantasy-in it, the reviewer, so offended by what he saw as Lennon going LCD with an album full of pablum, forsaking his creative legacy in the process, declared at the end of his review that “John Lennon is dead.” A month or three later Mark David Chapman shot him down.
A particularly interesting example is the story of Enoch Soames. In 1919 Max Beerbohm wrote a short story, set in 1897, in which a man called Enoch Soames travels through time to visit the British Library at a given hour on a given date in 1997. Teller, of Penn & Teller, liked the story so much that he arranged for a ‘real’ Enoch Soames to appear in the British Library at the scheduled time.
The movie Network was fiction in 1976, but since then has almost all come true.
How so? In Misery the drunk author slides off the road in a car, breaks his leg, and is helpless until an obsessed fan “rescues” him and then is held captive by the woman until he writes her a new book with her favorite character.
King when jogging, got hit by a van with a distracted driver, and immediately went to the hospital.
Beyond bad things happening to authors, I’m not really seeing it.
Gregory Benford wrote a story in 1976 about Lennon being murdered by an obsessed fan.
You’ve got that backwards:
*The idea for adapting the book into a film came about when director Mel Stuart’s 10-year-old daughter read the book and asked her father to make a movie out of it, with “Uncle Dave” (producer David L. Wolper) producing it. Stuart showed the book to Wolper, who happened to be in the midst of talks with the Quaker Oats Company regarding a vehicle to introduce a new candy bar from their Chicago-based Breaker Confections subsidiary (since renamed The Willy Wonka Candy Company and sold to Nestle). Wolper convinced the company, who had no previous experience in the film industry, to buy the rights to the book and finance the picture for the purpose of promoting a new Quaker Oats Wonka Bar.*from wikipedia.
I don’t know if this fits the OP, but (one of ) the definition(s) of Chutzpah(sp?) was killing your parents and then throwing yourself on the mercy of the jury claiming to be an orphan. After the Menendez Brothers trial, on of the jurors said she felt sorry for the them because they would never get to see their parents again.
Actually, per Wikipedia, that was the pilot episode. (Taking WP’s word for it as I’ve never seen The Lone Gunmen)
Oh man, bad pun.
Dick Tracy’s two-way wrist radio.
And I don’t doubt that flip-style cell phones were created by someone who just had to say “Kirk to Enterprise”. 
The same thing happened with their 8-bit tie. Though that wasn’t in a previous work of fiction beforehand…well, maybe some 8-bit character wore a tie somewhere, I can’t recall.
In the Bob Clampett cartoon Tortoise Wins By A Hare, released in 1943, one scene depicts a newspaper showing the big race between Bugs Bunny and the tortoise. One of the side headlines reads “Hitler Commits Suicide.”
I seem to recall a Bloom County comic where some character is telling Opus a number of wild, absolutely impossible things. Or so they seemed in the mid-1980s, since one of the things the character says is something like, “Soviet Union admits communism is a failure, free elections to be held Thursday.”
I’m embarrassed to toot my own horn, but WALMART IS FREAKING SELLING COFFINS NOW, which I made a joke about once or twice in an online comic I used to do.
In 1971, Grace Slick of Jefferson Airplane wrote a song called “Law Man.” The lyrics, written in first person POV, imagined herself as a faded madam having a shotgun standoff with a police officer many years her junior.
In 1992, Grace Slick was a faded rock star (in the throes of a bad alcoholic relapse) who had a real life shotgun standoff with a police officer many years her junior.
The very first episode of SNL ran a commercial parody for a razor blade with (gasp) three blades.
IIRC, the tag line was, “Because you’ll buy anything.”
By the way, I believe today is Grace’s 70th birthday.
Asimov coined the term “pocket calculator” for his story “The Feeling of Power.”
The line’s still around today. And despite the unsourced allegation near the end of the article, it never went dormant. At least I’ve never known a time when you couldn’t at least buy Nerds and a few other things made by Wonka.
It was actually the giant cannon that was called the Columbiad, but only because it was a columbiad.