How times change!
When I undertook my first First Aid course we were told that even though you saw it in the movies, the way to pop a dislocated shoulder back into its socket was not to put your foot on the side of the chest and give a good upwards tug on the offending arm, but to place a tennis ball in the dislocated arm pit and apply pressure to the ball, gently forcing the shoulder back into the socket and hopefully not trapping or otherwise damaging any ligaments on the way.
Unlike the movies, the patient would not then stand up and carry on doing what he was doing before but would suffer stiffness and pain for a few days and should really have the joint immobilised and the limb supported.

Watching the rugby yesterday, Perpignan and Northampton I think, we saw a chap felled by a vicious tackle. Yep and there on the slo-mo you could see the shoulder drop and move forward, straight dislocation.
But what's this? No remedial treatment on offer. Immobilise the limb and then help the poor rugger bugger off, to be fair to the true tradition of rugby he did walk, well stagger, supported by two helpers, no stretchers for these guys!

Then we hear that he's going to be out for four months!

Four months?

Four months for a dislocated shoulder?
The implications quickly dawn.

This could mean that the a whole pantheon of films need to be re-worked.

All those westerns where the cowboy falls from his horse during the stampede. No longer can the next cow-poke to come along simply lassoo the injured limb and jerk it back into its proper place. They'd have to round up those stray bullocks without him and carry on with the cattle drive. By the time our hero was better those young bulls would be 500 miles away being fattened up for the butcher.

And what about the gunslinger, set upon by the thugs in hire to the baddie? No longer after a good beating will he crawl away to hide and recover. No looping his belt around his dislocated arm and the horse's stall in the deserted barn, then with a grimace and a muffled grunt of pain, pulling his body hard, backwards. No closing his eyes and exhaling as he then leans forward and flexes his fingers, undoes the belt and sets about making his plans for revenge and a face-off on Main Street, man to man, the next high noon.
By the time our white stetsonned gunslinger was ready to stand with his back to the sun there would be no town left for him to clean up.

Good grief if they'd had to have four months off Clint Eastwood's Thunderbolt would have never even met Lightfoot and they wouldn't have tracked down the hidden loot from the long ago bank heist.

Even worse Mel Gibson's Martin Riggs in Lethal Weapon, who can dislocate his shoulder at will but then has to rather painfully bang said shoulder hard against a solid objuect; wall, door, locker, to knock it back into place; would have been out so long they never would have finished the film, let alone the three sequels.
Instead of being called Lethal Weapon after Riggs' hands which are classed as a lethal weapon, it would have had to be called Stressed Out Dad after Danny Glover's charachter.
Hmmmn not quite the same is it?