And the actors who suffered for someone else's art.
Can the end really justify the means? A question that certain directors really should have asked themselves when pushing their actors to the absolute limits in pursuit of a great performance.
We're not just talking hard taskmasters who demand endless takes or are notorious for having tantrums on set (mentioning no names, except, um, they're both called David), these are the times when directors went beyond reasonable limits to get something extra special from their stars – and fortunately succeeded.
1. William Friedkin on The Exorcist
Possibly the greatest horror movie of all time (see below), certainly an absolute masterwork of unease boasting visibly fractured performances all round. Friedkin fired a gun (only a blank cartridge, but who knew at the time?) next to Jason Miller (Father Karras) to elicit a look of shock for one scene, and yanked Linda Blair and Ellen Burstyn so hard on harnesses that they suffered back injuries.
It was his treatment of William O'Malley, who played Father Dyer, which is perhaps most notorious. Unsatisfied with his performance, Friedkin took O'Malley to one side and asked him: "Do you trust me?" When O'Malley said he did, Friedkin slapped him in the face and then immediately yelled "action", which for better or worse, got him exactly the heightened performance he was after.
2. Eduardo Sanchez and Daniel Myrick on The Blair Witch Project
This highly influential and experimental horror used unusual means to achieve greatness – though fortunately not by brutalising its cast, for once. The found-footage mock-doc sees three student filmmakers enter the Burkittsville woods while making a film investigating an old legend.
Myrick and Sanchez reportedly wrote a 35-page outline but asked their actors Heather Donahue, Josh Leonard and Mike Williams to improvise most of the film around scenarios that they would drip feed the cast, as well as having them do their own filming, leading them deeper into the woods, and doing their very best to terrify them during the night. The result is a very, very frightening film with some highly realistic performances.
As if that wasn't enough, the cast had to pretend to be actually dead while the movie was in the middle of its promotional hype. Not the greatest of experiences for burgeoning young stars, it turns out. Despite delivering great turns, none of them are famous for anything else.
3. Alejandro G Iñárritu on The Revenant
Iñárritu didn't spare his cast their precious Hollywood feelings when shooting his survival epic. Leonardo DiCaprio has said it was one of the harshest experiences in his career, and this from the man who starred in Critters 3.
"I can name 30 or 40 sequences that were some of the most difficult things I've ever had to do," he told Yahoo. "Whether it's going in and out of frozen rivers, or sleeping in animal carcasses, or what I ate on set. [I was] enduring freezing cold and possible hypothermia constantly."
(What he ate on set included raw liver.)
DiCaprio admitted that he "knew what [he] was getting into", but we're not sure that attitude was shared by the crew, many of whom allegedly quit or were fired (one described the shoot in the Canadian wilderness as "a living hell").
Still, DiCaprio finally bagged his Oscar, so we guess all that carcass-sleeping was worth it.
4. Ridley Scott on Alien
Alien's chestburster-at-the-dinner-table scene is one of the most famous jump scares in all of movie history, but it wasn't just the viewers who were jumping out of their skin when John Hurt kicked the bucket.
Hurt's castmates knew in general terms what was going to happen ("Its head will move and it's going to have teeth"), but director Ridley Scott did not prepare them for the visceral reality. "Everyone [in the crew] was wearing raincoats," Sigourney Weaver told Empire. "We should have been a little suspicious. And, oh God, the smell. It was just awful."
That smell was the off-cuts and organs from the butcher and fishmonger that made up a surprisingly large percentage of the special effects budget on the horror classic, and formaldehyde, all of which had been lovingly poured into Hurt's fake chest cavity.
"Look, I worked with Roman Polanski on Death and the Maiden," said Weaver. "He would shoot a gun off. You can act, sure, but when you're surprised, that's gold."
Veronica Cartwright famously passed out during the chestburster scene after a 3ft stream of blood "caught her smack in the kisser". We can't blame her.
5.. Tobe Hooper on The Texas Chain Saw Massacre
Part genius, part accident, part actual nightmare, Hooper's cannibal horror is the other greatest horror movie of all time (see above), which also turned into an ordeal. Though perhaps not in such a calculated way as Friedkin's method. Shooting on a shoestring in the extreme heat of Texas, the cast and crew worked for up to 16 hours a day, seven days a week, for a month.
The budget was so tight that, according to Gunnar Hansen who played Leatherface, they didn't dare launder his costume for fear it would get lost or change colour, so he wore it day in, day out.
It was by no means the stinkiest element of the set, which was adorned with skin, bones and blood from dead animals. The food at the dinner table scene was rotting, and during the above scene they decided to cut Marilyn Burns' finger for real because they couldn't get the fake blood pipe to work properly.
"Everyone hated me by the end of the production," said Hooper. "It just took years for them to kind of cool off."
6. The Wachowskis on The Matrix\
Talk about cruel – the Matrix directors pushed star Keanu Reeves to new limits before he was even allowed to read the script. Yep, poor old Neo had to devour three books – Introducing Evolutionary Psychology by Dylan Evans, Simulacra and Simulation by Jean Baudrillard and Out of Control: The New Biology of Machines, Social Systems, & the Economic World by Kevin Kelly.
There was no dodging that bullet...