“Call me Ishmael —“
But your name’s Kevin.
“Call me Ishmael —“
But your name’s Kevin.
That moment where you get three chapters in before realizing you read this a few years ago. 
A true story:
I was about half-way through a Lucy Foley book, impatiently waiting for the murder. I finally googled it, and it turns out Lucy Foley also writes historical fiction/romance, not just mysteries. Who knew?
Your book jacket for "The Origin of Species" drops off to reveal you are really reading "Garfield at Large".
Gotta love that lasagna-loving feline.
Not knowing whether to strike up a conversation with the person at the next table reading Steven King's "On Writing."
Realising why the pages that you'd carefully prised apart with your fingernails were stuck together in the first place.
When the author goes on a quest for bunk beds.
You're reading a Japanese book in public and someone notices you reading it "backwards."
The book flies across the room because your moment vector is off.
Clifford The Big Red Dog Lipstick 💄