Hobo: "That skirt you're chasing must've moved on ahead. We got to high tail it to the hog, pronto!"
Hero Boy: "The hog?"
Hobo: "The engine. The engine, you tenderfoot. We've got to make it before we hit Flat-Top Tunnel."
Hero Boy: "Why?"
Hobo: "[So many questions. There's but one inch of clearance between the roof of this rattler and the top of Flat-Top Tunnel. Savvy?"