Pigman

The original plot called for the teens to get stranded on a deserted island. This idea was scrapped after filming conditions in Acworth, Georgia were unbearable and the script re-written to feature an abandoned car in Appalachia.

The teenagers are stranded because their car radiator overheats, thus sending them on a mission to find water. During the dialogue between Jason and Elma, a crystal clear lake is visible behind Elma's shoulder.