Any Jean Luc Godard fans here?
He made a film about the making of a film: Godard’s Passion.
Earlier this year there was a film about him making a film: Godard Mon Amour.
Unfortunately the movie within the movie in the second one isn’t the first movie.
It’s the scene with Tom Hanks and Victor Garber “tearfully” reminiscing about The Dirty Dozen that puts me on the floor every time. 
One of my good friends is that guy to about six decimal places. Okay, he’d never blow his rent money on an action figure of Isis from 1974, but other than that…