Through out 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 affects of the splice are simultaneous.
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 girls are at the table in the café eating, Zoë Bell is seen to take a small piece of food on her fork. She then chews it for a second and swallows, then carries on chewing with nothing in her mouth. She then dips the fork back to her plate not lifting anything and putting the fork to her mouth and begins to chew again with nothing in her mouth.
In the scene at the Chili Parlor, Warren buys the girls a round of shots. They slam the shots, exchange some banter, then Butterfly says she is going out to have a cigarette. She clearly taps a smoke out of the pack, grabs the lighter, and begins to stand. Then, there is a quick close up of a hand grabbing the smokes and lighter off of the table, which is already in Butterfly's hand.
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.
When Michael Parks 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.
At the end, after the cars wreck, spin out, and go airborne, later scenes show them driving with perfect alignments. After all those wrecks, at the speeds they were driving, the cars would be shaking like crazy, if they could even really get to those speeds again.
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.
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.
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 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.
JJ has her hands and feet dangling out of the car's side-windows while lying on the rear-bench. 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 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.
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 final scene, when Stuntman Mike crashes, you can see the driver's door is still on the car. Then, when the girls come to get Mike, the door isn't there anymore and you can notice Mike's head and arm overflowing left side of the car as he's crying out his wounds.
Before Stuntman Mike drives crazy with Pam, they stop at a stop light and his window is up. Before he throws the pictures out the window the window is down. Stuntman Mike was never shown opening the window.
When Stuntman Mike rams the girls' car from behind at the end, we see Zoë Bell through the rear window lying on her back on the hood of the car holding on to two belts. As he repeatedly slams into the car from the sides, Zoe loses her grip of the belts and is lying on her belly hanging on to the tip of the hood. Just before he rams the girls' car from behind the second time, you can see that Zoe is once again on her back holding on to the belts. The next shot after the ramming shows Zoe on her belly holding on to the tip of the hood.
In the last scene where the girls hit their car into Mike's car, his car somersaults and is back on the ground with all 4 wheels in place. But in a close up shot, when girls pull him out of the car, one of the wheels is not there (rear left).