The ending episode of Breaking Bad
If, like me, you thought--counter to the mountains of praise it received--it was logically and physically extremely implausible, know that we're not alone. Two commenters have offered a persuasive case that the whole episode, after Walt finds the car keys a couple of minutes in, is actually his fantasy. Norm McDonald's take. Emily Nussbaum's.
I feel better.
My wife says this explanation reminds her of Ambrose Bierce's "An Occurrence at Owl Creek Bridge".