Continuity mistake: At the end of the movie, when Glass is chasing Fitzgerald, at the top of the hill before they both plummet to the edge of the stream, you can easily see the stream current below moving right to left. Then, after the fight scene, when Glass is presumably returning back up the hill to his horse, you can again see the stream, but this time the current is moving left to right - as if the camera was now filming Glass moving up the hill but now on the other side of the stream.
eyedoc
23rd Jan 2017