Revealing mistake: You can see Hero Boy putting the ticket in his pocket after getting it punched the second time, before finding his seat on the return journey. However, the ticket slowly evaporates in the air as he is about to put it into the pocket. His hand thus enters the pocket ticket-less.
The Polar Express (2004)
1 revealing mistake - chronological order
Directed by: Robert Zemeckis
Starring: Tom Hanks, Michael Jeter, Chris Coppola, Leslie Zemeckis
Continuity mistake: During the scene when the Polar Express slides across the ice and the conductor is telling the train controllers to head for the tracks, the distance between the train and the tracks keeps changing.
Conductor: One thing about trains - it doesn't matter where they're going. What matters is deciding to get on.
Trivia: The ticket that gets lost often times floats almost exactly like the feather does in the beginning of "Forrest Gump" (1994), another Robert Zemeckis-Tom Hanks film.
Question: What kind of instrument was the bum playing when we first meet him?
Answer: Violin.
Answer: The instrument is called a Hurdy-Gurdy. It is a type of wound string instrument.