Something (possibly an incident) that Richard Nixon repeatedly refers to as "the whole Bay of Pigs thing" in the Watergate tapes, and is presumably related to the CIA and of blackmail potential, has never been properly explained. The infamous 18-minute gap is in close proximity to discussions of this subject, possibly obscuring a clarification.
There is also the botched CIA-sponsored invasion of Cuba in 1961? . It is highly probable that Nixon is referring to that little disaster of an invasion and not something else. Since the Bay of Pigs was conceived under Eisenhower at a time in his term when Nixon was quite powerful as VP, it's likely that it is at least related to that incident, but exact details of what Nixon is referring to, and how it could possibly come back to bite him, however, have never been revealed.
There is a conspiracy theory that an anti-Castro group convinced Lee Harvey Oswald to assassinate JFK because they wanted another Bay of Pigs invasion, and they felt that JFK was getting soft, which they thought would prevent him from going through with it.
Highly unlikely considering Oswald was a die-hard Communist.
Debatable, as many researchers believe that Oswald's Communism was a CIA cover related to his "defection" to the Soviet Union.
What the big question is is why Nixon was concerned about the Bay of Pigs incident affecting him, since, as Haldeman pointed out on the tape, "That was Kennedy's screwup." People wonder why Nixon would be concerned about the fallout affecting him, especially when the more pressing issue was the Watergate break in.
On July 22, 2008, the Los Angeles Sparks and Detroit Shock of the WNBA got into a bench clearing brawl that resulted in widespread suspensions and fines. It resulted in the most attention the league has ever gotten, but no directly involved parties will speak of it now. And it did so much for the Shock that they moved to Tulsa less than 2 years later.
Tampa Bay Lightning coach and former hockey player Guy Boucher has a very distinctive scar on his cheek◊. When asked how he received the scar, his answer was, "it's not hockey-related. I didn't tell anybody back home, so it's like this little enigma. My kids don't even know."
Similarly for the longest time Tina Fey would not reveal how she got the scar on her left cheek. She was slashed by a stranger as a 5 year old.
The creator of 7Up died without ever telling anyone how he came up with the name...
Apparently it has something to do with lithium, which has a mean atomic mass of approximately 7.
In LEGO's 2003-2004 promotional and story materials for "The Astrobot Diaries", in which two astronaut minifigures were chosen to go to Mars, it is repeatedly mentioned that Biff Starling is a replacement for another astronaut who suffered a "freak zucchini accident". When asked about this, characters respond with variations of either "It's classified/still being investigated" or "You don't want to know."
One of those "Reasons Why I Didn't Do My Homework" shirts you see being worn all over by juvenile delinquents in middle schools says "It was destroyed in a freak accident involving a hippo, a toaster, and a bag of frozen peas. You don't want to know the details"
Colbert: I want to thank you for not asking me about that thing that we pre-agreed that you wouldn't ask me about, ok? O'Reilly: Ok. The kid— the thing that happened... Colbert: Don't, eh-ah... ok?
When voice actress Amanda Winn Lee was asked in an interview to describe the scariest experience she'd ever had with a fan, she dropped dead silent for a moment before her husband Jaxon Lee suggested she talk about her second-scariest experience. See for yourself. She's never revisited the topic since.
Another voice acting related Noodle Incident: For years during The Nineties voice actor Tristan MacAvery was an employee of ADV Films and colleague of Matt Greenfield. Around the turn of the decade something happened between them that caused MacAvery to quit ADV and voice acting in general and develop an outspoken hatred of his former employers, Greenfield in particular. Rumors have been flying for ages, but this day only those involved know exactly what happened.
Marvel Studios and Terrence Howard were notoriously tight-lipped about Howard being replaced by Don Cheadle in Iron Man 2. It's still uncertain why Howard was fired, although money is an oft-cited (but not confirmed) reason.
In modern Turkey, the end of the Ottoman Empire during World War One is basically a big Noodle Incident that is taboo to talk about, mostly because that was when Turkey's Christian minorities began to suspiciously vanish.
The Creation of the Universe. We still don't know what exactly happened with 100% certainty.
The Roman poet Ovid did something that got him exiled to Tomis on the Black Sea by Augustus. Despite writing several volumes of poems complaining about his exile, he refuses to describe the cause more specifically than "a poem and a mistake" (carmen et error). Modern theories start with him being involved in Julia's love affair and move up from there.
For years, neither J. Michael Straczynski nor actor Michael O'Hare would say exactly why the latter was replaced with Bruce Boxleitner after the first season of Babylon 5. In June 2013, some nine months after O'Hare's death, Straczynski finally told the truth, having promised O'Hare that he would; O'Hare, throughout the first season, was battling near-crippling schizophrenia, but refused to seek treatment for fear of putting other people's jobs at risk and not finishing filming. Somehow he made it through the first season, to be replaced by Boxleitner for the remainder of the series' run. O'Hare asked JMS to keep quiet about it until after his (O'Hare's) passing, but asked that his story then be told in hopes of raising sympathy and awareness for those with mental illness.
On the Today show of May 27, 2013, Kathie Lee Gifford tells Hoda Kotb that she has been banned from returning to Santorini Island, Greece, and claims there is a big photo of her at the airport with the caption, "Do not admit." Kathie claims the reason why is because of a plumbing problem. When Hoda asks her what was the plumbing problem, she says, "I'll tell you at the commercial break."
In Terri Irwin's memoir of her married life with Steve Irwin, she recalls a family trip to Singapore where their young daughter Bindi decided to make tea while not wearing any pants.
Terri: When was the last time you had a girl with no pants fix you tea?
Steve: The last time I was in Singapore. note Steve hadn't visited Singapore since before he and Terri had met
Five decades later, Werner Herzog has yet to release (and, in all likelihood, will never release) "Game in the Sand", a 1964 short film. Not much is known about it, other than the plot concerns four children and a rooster in a cardboard box, and that there is a scene where the chicken is buried in sand up to its neck. According to Herzog, the filming "got out of hand", and he had to abandon the project. Given that his 1970 movie "Even Dwarfs Started Small" includes footage of piglets attempting to suckle on the body of their dead mother pig, chickens eating each other, and somebody being hit by a truck (all taken accidently in the course of filming), one can only imagine how bad "Game in the Sand" must get.