While Jack and Nancy are skinny dipping and the car is being towed, Nancy is behind Jack. In the next shot of the car being towed, she is a couple feet in front of him. In the next shot she's back behind him.
At the end, after Nancy completes her chat with Jack at the "Pinapple Princess" hut, his limo speeds away. But Nancy magically appears 50-60 ft down the road in the direction she originally came from, walking by the same broken-down pickup truck (toward the PP hut) that she previously ran by en route to Jack's limo.