Revealing mistake: In the scene where Maverick is 'taken away' to get his hands chopped off by his Indian friends, there is a vehicle driving down a highway in the distance. It can be seen in the far background, but it is obviously an automobile.
Revealing mistake: When Tristan kill the guy in the liquor storage and the hay fork goes through his chest, you can see that parts of the hay fork's tines closest to his body are not covered with blood. (01:51:05)
Revealing mistake: During the bison shooting scene, a bison goes down close to the camera and both horns jiggle like they're about to fall off. Looks quite fake.