Continuity mistake: During the chase scene at the end of the film, P. T. Boomer (a character cut from the film), can be seen on top of Diesel 10 during the shot where he enters a tunnel.
Continuity mistake: James' whistle disappears when Diesel 10 appears at the Smelter's yard.
Continuity mistake: When Diesel 10 is hanging, he's vertical. But in the next shot, he falls horizontally.
Continuity mistake: After Diesel 10 is covered in coal, Henry is next to Gordon, then suddenly next to Splatter and Dodge.
Continuity mistake: After Thomas collects the coal truck and Lily praises him, it briefly vanishes from behind him.
Continuity mistake: After Thomas crosses over the collapsing viaduct, his steam disappears too quickly.
Continuity mistake: The amount of sneezing powder on Splatter and Dodge changes between shots.
