When Daisy Duke chases Benny The Quill with Luke Duke, she is wearing tennis shoes as she runs towards the pool of water, and then falls into the quicksand wearing high heels. After getting pulled out of the quicksand, she is still wearing high heels. For the sequence featuring actual running, tennis shoes of course made it easier.
When Benny The Quill drives his small car under the semi trailer the wheels of the trailer are up on blocks to allow the car to pass under. The blocks are gone when the General Lee is shown jumping the trailer a few seconds later.