I know the trope. It seems familiar. Can’t think of any examples though.

reddit thread regarding the issue.

It’s a pretty popular trope in 80s and 90s movies. A lot of them would start en medias res with the character in some ridiculous situation. There would be a record scratch and a freeze frame of the character’s face, followed by the character saying something like “You’re probably wondering how I got here,” only for the story to rewind and explain from the beginning. I can’t think of a classic example off the top of my head, but Deadpool did a parody of it, if memory serves.

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Pretty popular trope which nobody can remember a single example of?

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Mandela Effect?
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Psychologists call the phenomenon confabulation. The term is used clinically to refer to memory defects experienced by patients with brain damage, and also to describe everyday phenomena like embellishing the truth when recounting events and inventing facts on the fly to fill in gaps in memory. We’ve all done these things at one time or another, though we’re rarely conscious of it when we do.