Visible crew/equipment: As Jake approaches the house after the van drives off, it looks like a crew member got caught at the side of the house and moves back as Jake is taking camera footage. (01:03:25)
Factual error: The "brick mansions" are in Detroit, but when the surveillance satellite footage is shown, the initial, close-up skyline shown from above is of San Francisco. Then as it zooms out it's looking at Chicago. (01:04:00)
Factual error: In the big battle scene at the Home Mart store after Robert turns the power off to the building, you see Robert grabbing welding canisters. When Robert has Ralphie turn the power back on, it cuts to one of the bad guys in the break-room, and a digital microwave starts counting down. A digital microwave could not have any memory of any prior cook settings, let alone any way to set it, since the power was already out. (01:55:40 - 01:56:35)
Continuity mistake: When Kevin Costner tapes up the fat guy to the bathroom shower rod, his watch changes arms back and forth throughout the scene.
Continuity mistake: In the very beginning Nicolas Cage is picking up his daughter. You see him standing outside his black Cadillac as she walks up. As they drive away we get an overhead view of the car driving away. If you look at the emblem on the trunk you can see it's an Infinity. The next time we see his car and throughout the rest of the movie it is the black Cadillac again. (00:01:15 - 00:01:55)
Revealing mistake: When the final race is under way, the silver Saleen S7 hits a Police SUV and makes it flip, you can see the smoke coming out of the bottom of the SUV where the cannon has fired to flip the SUV.
Factual error: When they show Alex's partner in the hospital his heart rate is showing 35 on the monitor. His heart rate is not that low from the EKG pattern.
Continuity mistake: In the beginning when Morton and Greg meet the drug dealers at the harbor, look at the big rig that is hooked up to the trailer. In the first few shots the truck brand is a Volvo, then when the truck drives away, it's an International.
Continuity mistake: In the scene where Ava shoots Damien, she has no bra under her sheer nightgown in one shot and then has one when she goes to the window in the next.
Continuity mistake: In the scene where Logan carries Veronica into her room and covers her with the blanket, she is fully clothed. When she comes out to ask him, "don't go," and then kisses him, she is not wearing pants and has a different shirt.
Factual error: When Rosie calls Big Al's number, she gives his address as 41 Ocean Avenue in Howard Beach, Queens. Ocean Avenue runs from Prospect Park to Sheepshead Bay, entirely in Brooklyn, and does not enter Howard Beach. (01:05:00)
Continuity mistake: While singing in a duet with Miss Piggy, Céline Dion is wearing a dress with a strap over her right shoulder. Near the end of the song, the strap is suddenly on her left shoulder.
Continuity mistake: Ben shoots the last bottle used as a target on top of the red drum. After that, he reloads his gun while chatting with his two partners, and magically, multiple jars and bottles appear on top of the drum so he can continue practising. (01:18:25)
Revealing mistake: Late on in the film; Arnie and the female officer kick in the door to one of his teams house. Unfortunately Arnie is in his 70s now and not as agile as he used to be, the door was open and simply pushed hard. Look at the door, it has no damage and neither does the frame. Also, the door barely opens past a hard push. As tactically trained operatives they would not have pushed the door if it was ajar either, they would have opened it slowly to avoid startling anyone inside and warning them.
Continuity mistake: During the early part of the movie, the left rear door of Doc's car is dented. For the rest of the movie, the dent is gone.
Factual error: When the guy is talking to him on the phone and the Russian smashes it on the floor, the phone smashes and the battery comes out but the guy other end can still hear him. (01:04:00)
Character mistake: Near the start, there's a misspelling of the word "Victim" in the newspaper heading "Police expect Beadie to mail latest victim's ID." Read by the man at the bar who is smoking a cigarette. (00:02:14)
Continuity mistake: Treat Williams is drinking a brown liquid from a glass (scotch?) while accusing Gina Carano of having something to do with his son's disappearance. Shortly afterwards, the liquid is a different color and the glass is much more full. (00:41:40 - 00:42:40)
Character mistake: When Jesperson imagines himself as a Mountie his uniform is completely wrong and is not even the right colour. As it was his ambition to join the force and he has photos of RCMP officers in his cab, it seems unlikely that he would imagine himself in a completely incorrect uniform.
Suggested correction: It's not a character mistake, for the reasons stated; it's a clear factual error from the filmmakers.
It's a character mistake since it's his imagination and, as you stated, it's not something the character would get wrong.
Revealing mistake: JR is in the weapon container of the crazy dealer, who passes him some of his goods. JR ends up holding in his right arm a MP5K and an M4A1, which combined are about 5 kilos, but then he passes him an M60 Machine Gun, which weighs over 10 kilos and that the relatively diminutive protagonist just handles throughout the scene gripping it with his left hand and making no effort whatsoever. (00:25:20)