In the scene where Johnny and Baby are practicing lifts in the water, you can clearly see orange leaves in the background. When he lifts her you can see them to the immediate right of her foot. This movie was supposedly set in the summer of '63...so where did the orange leaves come from?
This is a slip-up. The film was set in summer but the lift scenes were filmed in October. Since the leaves were already turning, they had to paint the leaves in the backgroud. If you look closely you can see the ones they missed.