The Legend of Ironhead Haynes - S8-E23
Other mistake: A lady comes in the shoe store and asks for a shoe in a certain size. She tells Al to hurry because she doesn't have much time. Al goes in the back to get her shoes. She sits there for 6 seconds then leaves. Why bother going to get shoes?
Answer: It was one of the hoses connected to the engine, nothing specific, but to indicate that Al tampered with the vehicle.