Ozark Tracker who has been working in the barn/blacksmith shop has the forge glowing white hot, the anvil ringing and metal bending, having heard the sonic boom, he realizes that since Del likes to go fast he should reshape the munchmobile for supersonic speed, a little more heat and some more hammering and he should have it ready tomorrow,
he hears the traction engine chug to a stop and goes outside to see what's going on.