Question: When the character was at the cafe and the truck was there, but he didn't know who the driver was, why didn't he just go and wait by the truck, smash the windshield, fill the gas tank with sugar or water, slash the tyres?
Charles Austin Miller
4th Sep 2021
Duel (1971)
28th May 2017
Duel (1971)
Question: I know it's never answered in the film but is it explained in the book just why the truck driver takes such a dislike to David Mann - he behaves this way after just a couple of overtakes?
Chosen answer: That is never answered for the film, and not knowing adds to the mystery and intrigue. No mentally stable person would target someone just because they overtook their vehicle on the road. It appears that Mann happened to cross paths with a psychopath. Steven Spielberg has commented that the multiple out-of-state license plates attached to the truck's front bumper may be "trophies" that indicate that the trucker is a serial killer who has run down other drivers. This could be a deadly game to the truck driver.
I just wonder why the driver's door on the big rig was open while it took a dive over the mountain.
Perhaps a hint that the truck driver escaped. You notice that the truck doesn't explode on impact, although the studio insisted it must; Spielberg fought the studio over the inclusion of a cliched fiery finale, as he wanted the crash to convey an ambiguous ending, suggesting that the driver might not have died. Spielberg even explained that the red liquid seen in the truck cab was not blood, but was some sort of automotive fluid. This all lent to the mystery of what actually happened to the driver, whose body we never see.
The stuntman driving the truck had to jump out of the truck right before it went over the edge, and due to equipment issues barely made it out, without having time to shut the door.
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Answer: At that point in the film, the protagonist David Mann is ready to confront the truck driver. When he sees the old Peterbilt truck outside, David mistakenly assumes the truck driver has already entered the diner, so he confronts a likely suspect that he sees at the counter (but he has misidentified the man). The misidentified man takes offense and punches David out. By the time he recovers his senses, David sees the old Peterbilt truck leaving the parking lot. Which means the actual homicidal truck driver never entered the diner in the first place and was waiting outside the whole time. If David had first gone outside to the Peterbilt, there was a good chance the waiting homicidal truck driver would have killed him right there, and the story would have abruptly ended. So, David's misidentification of the truck driver allowed the film to move ahead into its next act.
Charles Austin Miller
Yes, I get why the filmmakers did that, but I still think it is a plot hole. If the Dennis Weaver character was afraid of getting killed by the truck driver, I doubt he would have confronted him in the cafe.