When a filmmaker loses faith in the movie they're making, or an actor feels like the movie they're starring in is pure chipmunk poo, they understandably get upset and turn against their own film.
Director Peter Bogdanovich was on top of the world in the 1970s, making great films like Paper Moon and The Last Picture Show.
But then he made a musical called At Long Last Love, starring Burt Reynolds and Cybill Shepherd, which really broke his heart.
The reviews were so bad, and Burt was such a terrible singer in the film, that Peter felt he needed to write a nationwide apology:
It's rare for a director to turn against their own film, but actors often regret the roles they've chosen to play, especially when they get stuck in a multi-picture contract.
Nic Cage is famously hot and cold in terms of roles, so he's the last guy you'd expect to turn against a film for being pure drek, but apparently Dying Of The Light was just that bad.
However, Nic and the rest of the cast had signed a non-disparagement agreement, so they protested the film in a clever way- by wearing t-shirts with text from the agreement then posting selfies online.
Comedian David Cross wasn't so clever when he talked trash about The Chipmunks trilogy, in which he plays the main villain, calling the last film Chipwrecked "the most unpleasant experience I've ever had."
The disparaging remarks he made against the cast and crew who'd worked on an admittedly awful movie series left people feeling burned, so David was forced to issue a public apology. Sometimes the truth hurts, Hollywood...