When the fireworks at the auction go off, a woman in a black dress runs down the center aisle twice.
After Parker's stabbed hand is stitched up, and he's eating soup, you don't see a bandage or the stitches on his cut hand.
When the driver is shot in the right ear (blood everywhere) at about 17:20, the car goes out of control. When the car veers around the tree and goes skidding on two tires (about 17:38), we see the driver's right ear (17:39) - it is now uninjured.
Parker steals a blued M1911-type pistol from the hunters' motel room and it ends up in his duffel bag. Later, the blued M1911 has been replaced by a nickel-plated M1911, Ross's "best .45" from later in the film.
As Leslie and Parker drive in the Bentley for the first time, the upper side of Leslie's door is in dark blue/black leather, the next shot the leather is beige, the following shot its in dark blue black again. This change in color (different cars obviously) is seen in various scenes throughout the movie, for example when Parker pretends to read a newspaper when watching Melander, and when he is driving with Leslie in another following shot it is in beige, however when he tells her to get out of the car the upholstery is in blue.
When Leslie receives the email Notice of Repossession letter, the calendar next to the message shows September, but has 31 days on it. September only has 30 days.
The Ohio State Fair, the scene of an early robbery in the film, is one the largest fairs in the United States. Both crowds shown and the security demonstrated are more for what would be a small carnival, rather than such a major event.
The Palm Beach County Sheriff's Deputy wears the proper PBCSO uniform but his badge is from the West Palm Beach Police Department and not the County-issued PBCSO larger Star badge.
When Parker slides under the garage door as it is closing (twice) at Melander's house, he would have broken the infra red safety beam, so the door should have stopped and re-opened, alerting Mr. Rodrigo and his gang.
However, this assumes that the door has an infrared safety beam, and that it isn't one of the items of the house that needs fixing.
When the SUV goes out of control following the carnival job and goes up on two wheels, one of the shots clearly shows the SUV's lights indicating it is in reverse gear, even though the car is always accelerating and moving forward throughout the scene.
However the lights could have been on, because the mechanism or electrical system has been damaged.
After Parker steals clothing and items from the hotel room belonging to the hunters it is raining. The rain is obviously not real since it moves to cover up the entire frame as Parker is walking. Also the rain falls in an arc suggesting that it is not falling naturally.
Around 26 minutes, Parker gets into a car, just as it starts "raining"; however, it looks more like someone off screen is spraying water on him. This is confirmed when he sits down inside the car with the door open. Although water is streaming down his windows, you can clearly see the white car adjacent to him not only isn't wet, but is reflecting tree branches off of the windows.
Around 53 minutes, Parker is driven by Leslie Rodgers. After she drops him off, you can see her car has no rear license plate.
During the fight in Parker's hotel room the TV is smashed repeatedly. Every time it is hit you hear glass cracking as if it were a CRT monitor. Modern LCD, OLED, or Plasma would sound more like plastic than glass.
When Parker is driving the Bentley and makes a U-turn and stops, the reflection of a crew member and the gear is visible in the door.
(at around 50 mins) As Leslie drives, the camera tow car are reflected in the buildings she passes.
When Parker confronts Hardwicke in a standoff with guns pointed at each other, Hardwicke has the upper hand because he is holding Leslie as a shield in front of him. Parker, knowing that he has earlier disabled Hardwicke's weapon, dares him to pull the trigger and kill Leslie, which he eventually does after being taunted to do so, but that makes no sense, since it would remove his advantage in the standoff.
Parker hides two guns under tables, one under a tiled table and one under a wooden table. Spaces between the wood pieces of the tabletop are obviously wide enough to see anything attached underneath.
When Parker (Jason Statham) threatens Norte (Carlos Carrasco) with a gun, Norte mentions that he is neutral like Sweden, but Parker corrects him to Switzerland. Actually both countries are neutral.