Hey Arnold! The Movie (2002)

Other mistake: When Arnold and Gerald first bump into Helga at the bus stop, they ask her for bus money, but throughout the rest of the movie they never need bus money.

Gerald: Do these belts come in any other color?
Bridget: Black or pink?
Gerald: Uh, we'll take black.

Trivia: This film's original title was "Arnold Saves the Neighborhood" and was originally produced for TV as the last three episodes of season 5 of the show. However, due to successful test screenings and the success of the Rugrats films, Nickelodeon decided to release the film theatrically, hoping it would be a success. Instead, the film flopped, and as a result, "Hey Arnold! The Jungle Movie", the other film that was in production, was cancelled. The movie was then revived 15 years later as a TV movie in 2017.

zenee

Question: I'm not sure if this is a mistake or not, so I'll ask it here. In one scene, Bridget zip lines down to Arnold, Gerald, and Helga on the crashed bus. She uses a device attached to her sleeve to hook a zip line onto the bus, but when she goes down the zip line, it extends past the screen behind her. What did she do there? Did she attach the device to the sky, or something? (01:07:10)

zenee