Visible crew/equipment: When David Mann stops off at the reptile lady's place, he enters a phone booth to call the police. When he's inside, you can see a perfect reflection of Spielberg. Look how young he looks.
Great sites
Mistakes
During the entire movie each time the camera pans on the car's speedometer, the odometer clearly show completely different numbers in the cars mileage which are thousands of miles apart. See more...
Trivia
At the end of the film when the truck goes off the cliff, we hear an odd groaning sound. This is a dinosaur growl from an old movie Spielberg likes. Interestingly, this same sound is also used at the end of Jaws as the shark sinks to the bottom of the ocean. Spielberg did this to show that Jaws and Duel would always be closely connected. See more...
Duel mistakes
Visible crew/equipment: Just as Dennis Weaver goes back into the Diner after splashing his face with water in the washroom, you can see the shadow of the camera man, complete with camera on his shoulder, silhouetted on the back of his shirt and on the wall.
Continuity: There are moments in the film, notably during the railroad and pushing sequence where the car's appearance - such as being dirty or clean, changes somewhat; the truck changes during that sequence as well. (The film was first broadcast on TV, then later released to theatres, and the push sequence was specifically filmed for the theatrical release. An identical '71 Plymouth Valiant was used, but a very different truck.)
Duel trivia
Notice how the truck has many number plates on the front? Are these trophies from other victims he has claimed?
At the end of the film when the truck goes off the cliff, we hear an odd groaning sound. This is a dinosaur growl from an old movie Spielberg likes. Interestingly, this same sound is also used at the end of Jaws as the shark sinks to the bottom of the ocean. Spielberg did this to show that Jaws and Duel would always be closely connected.
This film garnered so much critical praise that it was theatrically released in quite a few countries, though it was originally a made-for-TV-movie for NBC in 1972.