As it was 4th July. 1776 might have been more appropriate but who wants to see a seventies musical about the founding of the United Sates of America?
I was wondering if there's a textual link to Herman Melville, 'Moby Dick'. Isn't this the story of a slightly crazy (Quint smashing the radio?) sea captain in obsessive pursuit of a dangerous sea creature?
I'm sure I heard somewhere that when the truck 'dies' in Duel, there's the sound of an animal on the soundtrack, and that this same sound was used when the shark is exploded and sinks. It's a very artful soundtrack / mix / sound effects worthy of study on its own.