As a semi-paranoid driver the idea of being terrorized by a tractor- trailer on an empty highway sounds terrifying to me. When I read the synopsis to Duel, I imagined a gripping thriller. And Duel is gripping, but there were no thrills. I believe the main reason is the chase is set in broad daylight, if this was set at night it would add a more isolated and vulnerable setting. Dennis Weaver was a convincing protagonist but his fear and paranoia were more spoken than needed, his physical acting didn't say enough. The film is still worth a watch due to the great concept, and decent execution (it was in no way boring, and could've been handled way worse), plus it's cool to see where Spielberg began.