Audio problem: During the final run to the Boar's Nest, Luke is driving General Lee. There is one final jump, and you hear Bo's rebel yell, but Bo is at the Boar's Nest.
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.