Factual error: At the beginning of the movie, Jason Sudeikis pops out of a door wearing a Jurassic 5 T-shirt. Problem is, the artwork on it is from the cover of Feedback, their 2006 album. The scene, as the introductory caption says, is supposed to happen in 2002. (00:00:55)
Factual error: A 1955 Chevrolet is parked in front of Lily Tomlin's 1955 Dodge. Its license plate reads "528 GPR." California license plates did not begin to use combinations of three numbers followed by three letters until 1969. The "528 GPR" plate would have been issued circa 1975 and originally had yellow letters on a blue background. For the movie, the blue background was repainted black so the colors were appropriate for 1955. However, an actual 1955 plate would have three letters followed by three numbers.
Continuity mistake: During the saloon heist, Luke Wilson comes in to distracts Harvey Keitel. Danny pulls out a roll of banknotes to buy "some real scotch from Scotchland"; one of the girls poured a drink to Smiley and put the bottle down, but the bottle in a following shot is in a different position. (00:50:50)
Continuity mistake: After the shooting at the concert, Lysistrata is in the bathroom downing the pill with some Don Julio tequila. The bottle lid is to the left of the bottle in the wide angles, to the right in close-up. (00:10:00)
Other mistake: During the opening, when Danny rides his bike past the boatyard, the image has been reversed. The registration numbers on the boats appear as mirror images.
Continuity mistake: When Zipper drops her off at her car at the beach, Marnie is wearing boots when she gets off his motorcycle. When she walks to the car she's wearing shoes.
Continuity mistake: In the opening scene, the two friends discuss about the pool and various fluids including the pleasant effects of the waterjets on their ladyparts. During these amenities, the sleeve of the bathing robe on the bench switches position back and forth between two positions (showing the stripe or not). (00:03:00)
Continuity mistake: During the fight in the garage, the protagonist neutralizes (and maybe neuters) one of the baddies crotching him with the car door. In that sequence, his hands keep changing position on the door. (00:07:30)
Factual error: Tina's striptease dance is mentioned several times as a notable scene in the fictional 1986 movie 'Camp Bloodbath'. When that scene plays out, the song Tina dances to is Warrant's 'Cherry Pie', which wasn't released until 1990.
Continuity mistake: Near the beginning of the movie when Joy is in her airline's company uniform and getting ready to go to work, the knot on her scarf changes from loose to tight several times in the different shots.
Other mistake: The day before the business trip, Vince Vaughn enters his son's room. They have an awkward chat about masturbation and when he leaves, his son checks out of the bad things that bullies with even worse photoshop skills post on Facebook. He is looking at two different posts, but two comments are exactly the same in both, complete with the same peculiar spelling mistake. (00:08:30)
Continuity mistake: When the two protagonists are introduced to the private room and watch Dan's video message, the clock in the background never moves despite the several minutes duration.
Continuity mistake: Towards the end while Brian and Welch are talking at the hotel, the sun on the wall changes between shots.
Continuity mistake: Théo shows up in class unannounced. The teacher tells him to sit next to "that girl", mistaking Daniel for one. The classmates of course have a cackle at that; the girl at the desk behind Daniel's laughs holding a pen in her left hand at first, right hand at the cut. (00:08:50)
Revealing mistake: From the sound made when the car hit the deer, as well as the deer's overall appearance, it was obvious the deer was fake. The fake deer's body was almost uniformly brown, but the "dead deer" on the road had a white underbody that went part way up its side and along its legs, which should have been visible on the "fake deer." (00:10:19)
Other mistake: The town is Mt Barker. The red and blue ribbons on the sheep pen say Mt Baker.
Continuity mistake: In the scene with the fireworks, the Deputy driving the vehicle has his outside mirror knocked off by a firework. You then see the same and only Deputy in the car, in the mirror getting out of the passenger side of the vehicle to confront the misfits. The change isn't due to the reflected image. (00:13:05)
Continuity mistake: At the beginning of the movie, the first thug is trying to convince Brennan to handle the gun. He repeatedly uses the trigger to show him that the gun is harmless; in the next shot the weapon mid-sentence is already turned around the other way, held out for Brennan. (00:01:15)
Revealing mistake: When Verdean is scrolling the Wikipedia page for the Israeli wrestler "Johnny Jerusalem", the page itself is a well thought out fake one (the wrestler in question is non-existent), but the prop person who made this fake did not bother going all the way through editing the wording of the footnotes ("References" paragraph), that display instead the name of the real wiki page they edited as foundation. The webpage is an edit of the real Wikipedia page of The French Angel, the real life pro-wrestler who was also rumored to be an inspiration for the look of cartoon orc Shrek. All the names and dates have been slightly altered ("Paul Blowzier in New York" instead of Paul Bowser in Boston, "Carl Pohiello" instead of Karl Pojello, etc). (00:37:20)
Factual error: Summer and Carmen are at the saloon and catch on the local news the report of the kidnapping. The scene is set in Tuscany, Italy, but the news anchor is Spanish actress Paz Vega, speaking with an obvious accent and mispronouncing words. To make the whole situation even more absurd, she is supposed to portray a native Italian speaker, "Giulia Carni": the last name is Italian sounding but nonexistent in reality, and the headline used for the news report, "Nonna-napper", "kidnapper of grandmother" has such an awkward and unnatural sound and feel in Italian and for an Italian audience, that nobody ever would use it. (00:37:50)