For this scene, I wanted to show the locomotive in motion, so as always I did some thumbnails, even though some of those were made before the actual design.
Having to put that complicated living locomotive in perspective was a real pain, but luckly i found a couple 3d models of a train and a human mouth that helped me keep my mental sanity, while focusing on the composition. Looking closely, in the background you can see Carnival Way, the scene i painted before this one.