Audio problem: At the end, as Bo reaches in to honk the General's horn to announce Rosco's arrival, you can see his hand doesn't touch the steering wheel.
The Scary Sky Skeleton - S1-E6
Audio problem: During the gang's ride on a bumpy road Fred warns Shaggy, Scooby, and Scrappy about some more bumps coming up. He's interrupted when they hit the bumps, then the word "bumps" comes out of Scooby's mouth.