The ambulance that arrives to the ranger station is a period-correct Ford van, but when it crashes into the tree it suddenly has the grille and front end of a Chevrolet/GMC van of the time.
When Daveed is fighting the three guys in the bathroom, the knife has a black handle when the attacker is holding it but changes to blue when it's sticking out of Daveed's shoulder.
In the opening scene with Elsa and Olaf lying on the rock, Elsa is barefoot with her shoes and socks lying near her head. When Olaf gets up and backs away to take her photo she's still barefoot. When the camera pans in she's got her shoes and socks on. When the camera then shows her from the back, her socks are on and she's putting on her shoes.
When the bear is lying on top of Eddie, Stache rolls over to recline on his right elbow and speculates that the bear is dead. Daveed emerges from under the gazebo, and calls a truce with the detective standing on top of the gazebo to check if the bear is dead. When the camera then cuts to the view looking down from behind the detective's shoulder Stache is again lying prone on his face.
When the EMTs go to open the ranger-station door, at first it seems stuck and they struggle to open it, but once they push hard enough, it swings wide open. In the next shot they're seen struggling to open it again.
The two kids try to eat a tablespoon of cocaine each, and although they spit out most of it, some would remain in their mouths and they would have inhaled some of what they spit out, yet they show no effects of having ingested/snorted cocaine.
Having a stethoscope on one's ears does not prevent from not hearing your colleague calling from the other side of the room.
Thornton is seen dead in the stretcher, but his face and head are normal and undamaged. A fall from an airplane would have severely smashed the whole body, head included.
The bear could not get "addicted" as fast to the drug and "sniff" it.
Elsa shows no wounds whatsoever despite having been heavily pushed down the slope by the ferocious bear.
In the opening scene, Hanna Hoekstra playing (Elsa) calls her fiancé "Kristofer" instead of Olaf. Olaf is the character's name; Kristofer is the actor who plays him.
[23 minutes in] When Daveed is in the phone booth speaking to Syd White, the traffic in the distance, is driving on what looks like the left-hand-drive system, rather than the American right-hand-drive system.
The red duffel bags are way too light when Thornton grabs them and throws them out of the plane.
Reba's dreadlocks would not have been a permitted hairstyle by a police force in 1985.
Despite apparently being set in late summer or early fall, the time goes from full daylight to complete night minutes after they enter the cave.
A Hollywood myth is perpetuated when a character removes his pressure bandage every so often before applying pressure again. In case of arterial bleed, pressure must be applied at all times and a tourniquet (for example a Combat Arterial Tourniquet) must not be removed.
All of the shoulder patches, whether police or ranger or game warden, are placed too low on the sleeves. In real life they're near the shoulder seam of the sleeve, in the film they're halfway down near the elbow, however this costume inaccuracy may be intentional for satirical purposes, being that the agencies depicted are implied to be incompetent or corrupt.
When Sari dumps out Dee Dee's backpack, one of the items inside is a Rubik's Cube. The tiles are made of plastic. The film is set in 1985, at which time the colors were made from adhesive paper. Plastic tiles did not start until 2014.
The movie is supposed to take place circa 1985, but the ambulance that shows up to the ranger station is a 1994 Ford Econoline.
While the Rocky (1976) films existed in 1985, the toy title that Henry wears did not exist for sale at that time. It was released in 2006 to coincide with the sixth film Rocky Balboa (2006). It has since become a rare collectible. It's based on the Heavyweight Title from Ring Magazine.
When the bear is attacking Eddie in the woods, Stache tells Eddie to "just tap out." While there is evidence of the "tap out" as a means of surrendering a fight in martial arts dating back to the 19th century, the term did not become common in popular culture until the rise of mixed martial arts in the late 1990s, nearly 15 years after when this film is set.
Very poor quality dubbing of several lines of dialogue during the course of the movie.
The medic did not need to listen to her patient's heart for so long; on the contrary, she should have shifted her stethoscope rapidly towards the lungs on the sides given the obvious shortness of breath displayed by the injured character.
When Bob confronts Daveed, Kid, and Eddie with a gun, not once in his several minutes with them does he identify himself as a police officer. Not only would that be an absolute requirement that an experienced Detective like him should be well aware of, but his failure to do so would absolve Daveed of any charges for pointing a gun at him since by not knowing he was a police officer, Daveed would have had reason to believe he was in danger.