What a Day! is a magazine story.
It is a very busy day on Sodor and the Fat Controller does not feel very well. Diesel's leaking oil everywhere, the troublesome trucks have derailed, Gordon is late, and a branch has smashed his office window. The Fat Controller then goes home and leaves one of his guards in charge. Thomas then has the idea of giving him a surprise to make him feel better. When the Fat Controller returned to work, Thomas' driver presented him with a window filled with coloured glass in the shape of an engine.