Mandy Patinkin bruised his rib trying to hold in his laughter on the set of The Princess Bride.

Joaquin Phoenix dislocated his knee while filming this scene in Joker.

Ellen Burstyn permanently injured her spine after being thrown against a wall in The Exorcist. The scream heard in the film is her actual scream from pain.

Hugh Jackman stabbed his upper thigh — quite close to the groin — while filming a scene with his sharp claws in X-Men 2.

KJ Apa broke his hand while punching through ice to save a character on Season 1 of Riverdale.

Jeff Conaway injured his back during a dance scene in Grease. This may have led to his lifelong painkiller addiction, which resulted in his death.

Malcolm McDowell scratched his cornea due to the contraption used in A Clockwork Orange.

Channing Tatum burned his penis by pouring hot water down his pants to stay warm on the set of The Eagle.

And cut his head during this intense scene in Foxcatcher.

Chevy Chase broke his pinky while kicking and punching the Christmas lawn ornaments in National Lampoon’s Christmas Vacation.

Sean Astin cut open his foot on a shard of glass that the divers missed on their initial sweep on the set of Lord of the Rings: The Fellowship of The Ring.

James McAvoy broke his hand on the set of Split, which led the writers to write his injury into the plot of Atomic Blonde.

Nicole Kidman broke a rib while filming a dance sequence on the set of Moulin Rouge!.

Viggo Mortensen broke his toe while kicking a helmet in Lord of the Rings: The Two Towers. The scream you hear in the film is his actual scream of pain.

Leonardo DiCaprio cut his hand open on a piece of glass but didn’t allow the bloodied hand to make him break character in Django Unchained.

Brandon Lee was killed due to an accident involving residual gunpowder in some prop guns on the set of The Crow.

Jacob Elordi suffered a really bad concussion after banging his head too roughly on a hardwood floor repeatedly in Euphoria.

Dylan O’Brien suffered a head injury that halted filming for several months on the set of Maze Runner: The Death Cure.

Zac Efron injured his wrist while filming on this complicated revolving set in High School Musical 3.

Tom Cruise injures himself on practically every Mission Impossible shoot, like this time he broke his ankle.