Continuity mistake: In the scene right after Maggie Q sets the explosive on the tracks, her bike is not more than 5 to 10 feet from the track. The next scene as the raiders are riding down on her she is about 75 feet to the right of the track and her bike is now 30 to 40 ft from the track. During the fight she doesn't really move in any direction very far, and all attacks are parallel to the tracks. Yet somehow someone lands and breaks the trigger mechanism and her bike is right back next to the tracks.
Continuity mistake: After pinning Priest to the train wall with the dagger, Black Hat throws a lit lantern directly in front of him, starting a small fire in addition to the one already raging through the train cart. The flames are so close they lick Priest's boots and clothes. But moments later, when Priest frees himself from the wall, the floor beneath him is bare, with no sign of the broken lantern or of the small fire.