Other mistake: As soon as Tom chops his way through the front door to commit the murders, a "flight of stairs" can be seen. These steps are obviously a prop because they are linear and vertical (are flat and go straight up to the ceiling) and the people inside (ex-wife and new boyfriend) emerge from behind the "staircase" with little space to the wall parallel to the steps. (00:03:07)
Other mistake: Rachel drives a Volvo V-90 (wagon) and Tom has what appears to be a Ford 4x4 Supercrew with a large black metal grille guard. (Distinguishing features on the truck are absent except for a small Ford logo largely hidden by the grille guard; even the area below the dashboard is blackened.) Tom rammed his truck into the rear end of Rachel's Volvo several times. The first bump was not very hard, but the next four were. The top of the grille guard is high enough to reach the bottom of the cargo window but the window did not break. There should still be extensive damage to the rear end of the Volvo. Viewers do not get to see the rear end immediately after it was rammed (00:33:49), but there is a quick rear end view later. The Volvo has a soccer ball-sized dent on the right side by the tail light and a few small black scrapes on the bumper. This doesn't match the damage that would be expected, and - more significantly - the Volvo already had that damage BEFORE being rammed by Tom. (00:24:07 - 01:01:45)
Other mistake: In the angled side view of Tom sitting in his truck behind Rachel's Volvo at the gas station, a light-colored car appears from the rear of Tom's truck and can be seen going past Tom's side mirror. A car this close at the angle it was traveling would most likely be headed straight toward and smash into the white building across the street from the gas station. The car should be running parallel to Tom's truck; it is too far away from the intersection to go onto that crossroad. (00:31:24)
Other mistake: Fred was doused with lighter fluid and set on fire while strapped in a chair and his entire upper body was subjected to intense flames for at least a couple seconds. The chair was shoved several feet toward the door where a police officer was standing and started trying to smother the flames before they were off camera, but it can be assumed that it would take a few more seconds (at the least) to extinguish the flames. If he survived, Fred would have extensive burn scars, disfigurement, excruciating pain, have to undergo an unknown number of corrective surgeries, and face long-term rehabilitation. Later that day (within a few hours?), Rachel received a phone call and told her son Kyle that his uncle Fred was "going to be okay"! It was way too soon for anyone to know that and it defies logic. (00:59:30)
Other mistake: Tom is driving a stolen minivan with custom plates reading ROSIES. Later, you can see the minivan from behind when Tom is driving through the residential neighborhood. The plates are not the same.
