|This article is about the magazine story. You may be looking for the episode.|
Rusty's job is to repair the mountain railway and one day he discovers a bump in the wooden bridge. Duncan ignores Rusty and rushes off without taking on coal. He decides to cross the bridge to get to a coal bunker. Suddenly, the bridge starts to crumble. Luckily, Rusty is following close behind and soon rescues him.