After Mike gets shot and the Challenger ladies start chasing the Charger, Mike's blood on the windshield of the Charger appears and disappears throughout that chase several times.
By the last 10 minutes or so of the film, all the degrading effects have been removed.
Unclear as to whether this was intentional or not. The ending title is also is white, not yellow, as per the opening title font.
During the final chase, both cars are seen to overtake the same cars more than once In particular you see Stuntman Mike pass the silver VW to the left, then the brown Ford to the right. Moments later, an overhead shot shows him passing both the VW and Ford again, but this time to the right, therefore confirming this isn't just different camera angles being shown.
The inside and outside mirrors on the Challenger appear and disappear during the chase.
When Earl McGraw talks about Stuntman Mike and whether to investigate or to follow the NASCAR series in the hospital, he and his son walk through one corridor twice, entering it through the same door in both cases.
JJ has her hands and feet dangling out of the car's side windows while lying on the back seat. In the Civic hatchback the girls are riding in, the rear windows can't be lowered. Later on the car is also shown with the windows back in place.
In the credits soundtrack list, Ennio Morricone's "Unexpected violence (Violenza inattesa)" is misspelled as "Violenza in attesa", which could translate in English from Italian as "Violence awaiting".
In the closing credits, The Austin Chronicle is misspelled as "Cronicle."
In the scene at Guero's restaurant, the girls drink margaritas out of traditional stemmed margarita glasses. The real Guero's serves margaritas in standard round glasses. Also, although the exteriors were filmed on location at the real-life Guero's, the soundstage-shot interiors do not match any part of the real Guero's.
In the closing credits, Buellton, California is misspelled as "Buelleton."
As 'Death Proof' is an homage to the old, low-budget Grindhouse films of the 70's and 80's, there are many deliberate errors by the filmmaker to give an authentic Grindhouse feel.
The film pays homage to the slasher, exploitation and muscle car films of the 1970s, and at 1hr 1min a character talks about going online (internet). However, this film is obviously not set in the 1970s; the presence of 2007-era cell phones as well as consumer products such as Red Bull (created in 1987, first sold in the US in 1997) and clothing styles of the early 2000s is evidence of this.
During the interior shots of Kim driving the Challenger with Zoë Bell on the hood, the speedometer is on "0".
When the motorcyclist flies into the fireworks stand, his motorbike stops with a very unnatural jerk and the cable stopping the bike is not difficult to see.
When Mike is photographing the 4 girls walking, the end of the scene shows him with the camera on the roof of the Charger. If you look closely, you will see that the lens cap is still on the camera.
When Kim is driving the Mustang to the diner with the other three girls, the key is in the "off" position.
When Zoë Bell takes the iron pipe and then "rides" the car, Kim starts the car and turns it around with a power slide, skid marks from previous takes are visible.
Earl and Edgar McGraw are both Texas Rangers, so their jurisdiction covers the entire state of Texas. This explains how they could both work a case in El Paso ("Kill Bill") and Austin ("Death Proof") even though the two cities are over 570 miles apart.
Throughout the movie they simulate splices in the film, sometimes in key places like people's names. In movie projectors, the sound head is in a different location than the shutter/lens area and so the sound is a foot or two ahead of the picture frame that it corresponds with, so a splice will show a flicker then a second later hit the sound head and play static. In the movie, the sound and visual effects of the splice are simultaneous.
When Stuntman Mike gets out of his car at the convenience store, you see the Steadicam operator in the windows of the store and late on in the shot, you see "him" again when he brushes Abernathy's foot.
Shadow of the camera equipment on Stuntman Mike's shirt and seat during the final chase.
In the movie, the Challenger has window frames, which they hook the belts to that Zoë Bell holds onto while riding on the hood. Dodge Challengers do not have window frames like this. They were apparently added to prep the car for the sequence. You can also see the roll bar in several scenes.
There is an oil well seen in the chase scene set in Lebanon, TN. There are no oil wells in Lebanon, TN.
The second group of females stop at a gas station/convenience store in Lebanon, Tennessee to get "vodka and sugar-free Red Bull." This would be an impossible feat because blue laws in the state of Tennessee prohibit the sale of liquor and wine in grocery and convenience stores. Only beer can be sold outside of an alcoholic beverage commission licensed liquor store. The convenience store was obviously not in Tennessee because of the liquor and wine signs plastered on the building.
When the girls are driving in downtown Austin, they are crossing the Congress Avenue Bridge, but their dialog takes significantly longer than it would take to cross the bridge. It only takes about thirty seconds to cross the bridge at 35mph; their dialog takes over 2 minutes with the bridge railing showing prominently in the background, disappearing and reappearing.
The driving scene through South Austin, when the girls are en route to Guero's, contains dozens of continuity flaws. The scene was filmed along a three-mile stretch of Austin's Congress and S. Congress Avenues. Although ostensibly a continuous conversation, the backgrounds at different shooting angles change back and forth from the northbound to southbound lanes on Congress and S. Congress, and to parts of the street miles apart.
Abbie says they're in Lebanon, Kentucky, but, judging from the California Live Oaks (California's official State Tree), along the way, the car chase scenes are obviously filmed in California.
When the first girls are driving to the lake, Jungle Julia Lucai calls a station to play a song by Dave Dee, Dozy, Beaky, Mick and Tich, but whenever she says their names, she incorrectly calls Mick Mitch.
When the car smashes through the drive-in sign, the marquee lists Scary Movie 4 (2006) as being rated R, when that movie was rated PG-13 in cinemas.
When the girl is on the hood of the Challenger and the Charger keeps hitting them, why wouldn't she just slow down and stop and get her friend back in the car or safe off the hood? Especially when the Charger was in front of them. They could have let the girl back in the car and turn around before the Charger could also turn around.