Continuity mistake: When Chris is walking up to his parents' house, after being dropped off by the sheriff, he has a flier in his left hand. In the next shot as he nears the house, the flier has vanished. (00:05:20)
Continuity mistake: When Chris is working on the porch and Ray's mobile home drives up, a cooler box and wooden tool kit can be seen placed next to each other. In the next shot, the boxes have been moved apart. (00:09:35)
Continuity mistake: After the football game when Chris and Ray are sitting on the grass, you see Chris leaning back on his arms. Then the kid comes on his motorcycle and when it cuts Chris has his arms in front of him. (00:14:45)
Continuity mistake: When Chris checks his mail, and takes it out the box, he closes it, yet in the later shot it is open. (00:35:40)
Continuity mistake: When Chris is hitting the slot machine in the Casino, we see that the cover on the machine comes off, then the lights are off. But when the shot changes, the lights are on. (00:38:15)
Continuity mistake: When the deputy opens Chris's car door you see him standing close to the door. When it cuts to a shot from above you can see the deputy has moved several feet away from the door. (00:41:05)
Continuity mistake: When Johnny is patting down his first bad guy he tells him to put his arms down, but in the very next shot his arms are back on the hood of the truck. (00:52:40)
Continuity mistake: When The Rock and Johnny Knoxville are tearing Kevin Durand's truck apart, an electric winch is visible on the bull bar on the front of the truck. When the bull bar falls to the ground, there is no winch mounted on it. (00:53:45)
Continuity mistake: When the Rock and Knoxville are taking apart the bad guys truck you see a shot where the Rock is pushing a tire away from the truck which has no tires and then slicing it open with a chain saw. A few seconds later you see Knoxville taunting the bad guy and the Rock is again rolling a tire away from the truck. (00:54:05)
Continuity mistake: When Chris and Dani are at the police station and about to have sex, her shirt mysteriously reappears. They are kissing and Chris is shown removing her shirt (leaving her in a red bra). A few seconds later they are still kissing, and you can see that her shirt is back on. (00:58:55)
Continuity mistake: When The Rock shoots the last guy at the police station shoot-out, he is shot in the chest. When an aerial shot is taken, there are no bullet holes on his chest or anywhere else. (01:06:00)
Continuity mistake: Wheb Hamilton shows up to talk to Chris after he's been attacked, we see Chris unload some wood from his truck, then belt on a tool belt. After belting it on, he pulls his shirt out from under the belt and we see his stomach. There are no scars on his stomach from the earlier attack on him. Later in the courtroom, Chris opens his shirt and we see scars from his collarbone to below his navel.
Continuity mistake: When Ray Ray pulled up in his trailer and he and Chris are having a drink, Ray Ray gets a coke. The coke switches from his left hand to his right and back to his left.
Continuity mistake: After Chris becomes Sheriff we see him pull Hamilton over in his car. As they are talking the camera cuts to the far side of the car where we can see the girl in the passenger seat. She is facing forward at the road, and then when the camera cuts again from behind Chris we see that she is now looking at Chris.
Continuity mistake: When The Rock's family is held at gunpoint, one of the guys throws his stocking/face covering at them. In the next shot, he throws it again.
Continuity mistake: Towards the end, when the girl comes into The Rock's office, Rock closes his blinds. They are open in the next shot (you can see them in the background).
Continuity mistake: After Ray jumps onto the back of the thug in Chris's family's house, he tells Chris's brother to leave. At this point, you can see the vegetable peeler on the counter. When Ray picks it up, it's in a fruit bowl, which wasn't even there before.
Continuity mistake: When The Rock is presenting his case to the jury, the female gray-haired juror is portrayed by two different actresses.
Continuity mistake: When Chris pulls Jay over, Jay's date has her arms down by her sides, then as the scene flips back and forth, there is one shot where her right arm is up on the car door, then back down again.
Continuity mistake: In the scene when Chris is gonna bust up the casino, he reaches into the back of his truck and pulls out a length of 2X4, but when he is inside the casino, it has changed to a 4X4.
Answer: The role of sheriff is an elected, political position, and as recent US politics have shown, one can be elected to office with little or no previous relevant experience.