Scooby-Doo and Shaggy Rogers were on a speeding handcar careening down a railroad trestle, and nearly had a collision with the speeding Midnight Express. But Shaggy managed to stop the handcar (with a little help from Scooby), and pump it in the other direction away from the train. Then Fred Jones pulled a switch so the handcar would be rerouted to a siding, and pulled the switch back and let the train pass by on the main line.