The immense effort that goes into making even a terrible film is undeniable, and when it comes to big-budget, ambitious Hollywood fare, often things simply get too extreme for the cast to handle.
In the case of these 7 movies, an actor simply had enough with their working conditions, be it an aggressive co-star, a dictatorial director who doesn't know when to yell "cut!", getting caught in the cross-fire between warring cast members or failing to cope with a ridiculous makeup process.
While most of these performers were eventually convinced to return and finish their roles, largely for the sake of their careers and the huge cost of breaking a contract, each nevertheless took a stand and quit their respective movies, even if only temporarily.
In a time where film sets are being monitored more closely than ever for abusive and unreasonable conditions, it's safe to say that these actors seemed well within their rights to tell the director to take a hike...