During her speech at Villain Con, Scarlet Overkill walks past three fans sitting in the front row dressed up to look like her. When the scene zooms out to a long shot, the three lookalikes have disappeared.
The ruby that one of the minions spits out onto the stage disappears in the following scenes.
In Egypt, the pyramid is balanced on one of its bottom corners and falls landing upright on its bottom. Then a minion is seen turning the plans over which are upside down suggesting that the pyramid was built upside down on its top point. If the pyramid had been built upside down, it would've fallen on one of its sides and not its bottom.
The license plate numbers on both the hippie van and the car belonging to the lady playing "Vallkyries" are the same , and they are the only visible ones in the movie that are identical.
At the beginning of Scarlet's coronation, the sun is shining brightly. It continues to shine as she enters and light pours through the windows during the ceremony. As the minions enter the building, the sun is just beginning to set in a mostly clear sky. A few moments later the minions exit the building to total darkness and pouring rain.
The monarch has been barred from entering the House of Commons (the parliamentary chamber with green seats where King Bob signs legislation) since 1642.
One of Jimi Hendrix's guitars is supposedly shown. Jimi was left-handed, but he played a right-handed guitar re-strung for left-handed play because that stringing created a unique sound due to the angling of the pickups with relation to the distance from the terminus of the string. While the head of the guitar is never shown so the audience can see whether it is right- or left-handed, the mounting point for the shoulder strap is, and it denotes a right-handed guitar, as expected. However, the guitar is strung for right-handed play as well; it should have been strung for left-handed play. That, and the design of the guitar suggests a slightly stylized fictional version of a Squier, rather than a model he actually played.
The underground line is shows as the district line, but the district line is not a deep level tube line as shown in the film, and also runs alongside the circle line at Westminster whereas the platform suggests that only the district line runs as there is only a green stripe and no yellow.
The fire hydrants in the film are shown with hexagonal (six-sided) nuts, but most fire hydrant nuts/caps are pentagonal (five-sided) and require a special tool to open.
Intercoms for stores are found on the main floor near the cash registers, not on the second floor.
Kevin, Stuart, and Bob hitchhike a ride to Orlando in New York. New York Code 21-204 states that it is illegal to hitchhike in New York State only on the thruway (I-90). However, since they were on a street, they would not be caught for violating the hitchhiking law.
At the end of the movie, Stuart plays "Eruption" by Van Halen nearly ten years before Van Halen recorded it. Within the logic of this series, this could simply mean Van Halen heard the solo and decided to copy it from the Minions.
The Queen's coach is shown having no footman riding at the back. In reality, she always has two riding in a standing position at the back. Although identically liveried, only one is actually a footman, the other is always a highly trained, armed bodyguard, there to prevent precisely the events that follow in the story.
When the T-Rex roars at Gru after the rest of the cast ran off in fear, the top of the T-Rex's head and neck clips through the camera.
When Scarlet is running with the crown in her arms while evading the police, and while she is frozen, her right glove is mostly ripped off.
There are no fire hydrants in British streets which have flat plates in the ground allowing access to the mains water systems. These, however, are rarely used as British fire engines carry vast amounts of water on board to be used first.
The ticket prices at the Tower of London were shown in decimal currency (and were too expensive for the time). The film is set in 1968, but the UK didn't adopt a decimal currency until 1971.
When the minions pass the Statue of Liberty, it is shown with the gold plated torch flame. In 1968 the Statue of Liberty had a torch that was made of yellow glass panes held in place by a metal lattice. The gold plated flame was installed in 1986 as part of a major restoration of the statue.
The three Minions duck into a phone booth while being chased. The phone shown is a standard wall-mounted phone with a separate coin box. Such equipment was designated for private premises (pubs, schools etc) and a public phone booth in that era would typically have had a single-piece all-metal unit.
The Nelsons' family station wagon bears the New York license plate, "LUV2ROB". New York did not introduce personalized plates until 1977, which were limited to 6 characters and had pattern limitations. The plates on this car could not have been had until 1982 at the earliest, 16 years after the setting of the movie.
As the Minions arrive in the tube train (in 1968), "Mind the gap" is heard. This announcement wasn't made until 1969.
Just before the coronation, when Scarlet compliments the organist, the organist removes her right hand to give a thumbs up gesture. The music is still playing after she takes her hand off the organ.
After Scarlet hugs Tina and drops her, Tina says "Oh, yes!" Her mouth does not close after she says "yes".
At the end of the film, after the credits have finished, there is an obvious platform covering up the bottom of the screen. It is visible when the rat looks at the camera while holding a piece of candy in its mouth, putting its front paws on the platform. It is also visible when Bob blows bubbles to make the bee leave, when the Tower Guard is searching for Kevin, and finally when the T-Rex roars at Gru.
Outside Buckingham Palace they all went round the roundabout the wrong way.
When Kevin douses the TNT with water, he replaces a red American style fire hydrant onto a street in London. These style fire hydrants are not found in the U.K.
Stuart attempts to "chat up" a bright yellow fire hydrant, and is later seen with two fire hydrants in a jacuzzi. These are American-style hydrants; in Britain hydrants are simple pipes whose position is marked by a yellow sign with a black 'H'.
The Minions initially live in Switzerland, but they search Australia, India, and the United States to find Kevin, Stuart, and Bob, before they reach England. Since England is also in Europe, the Minions should have just taken a plane there. However, they may have wanted to explore other continents and countries before arriving in England.
The Nelsons drive to Orlando for Villain Con in a very short amount of time. In reality, it actually takes about 16 hours to drive from New York to Orlando. As such, the Nelsons should have passed through New Jersey, Delaware, Maryland, Virginia, North Carolina, South Carolina, and Georgia, along with crossing the state line of Florida, before arriving in Orlando.
When angry at Stuart, Bob and Kevin, Scarlet tapes over their mouths whilst she lectures them. Minions don't have noses. They wouldn't have been able to breathe, yet they showed no ill effects of being starved of oxygen.
It is never explained how Kevin returned to his normal size after spitting out the missile.
At Villain Con, there is a table that advertises the freeze ray. This is Dr. Nefario's invention, being shown to Gru. However, the minions do not interact with Gru (who eventually uses this invention) until the end of the film.
The movie never explains how Kevin and Stuart made it to the department store's intercom. They are only seen going up the escalator, and the scene cuts to a female voice announcing the store's closure over the intercom.
Gru is using the freeze ray to freeze Scarlet, but it appears at Villain Con that Dr. Nefario was using it only as a demonstration.
The "Queen of England" urges one of the minions not to get "mad". An older English person would never use the term "mad" in that context; she would say "angry" or "cross".
In the bedtime story Scarlet tells the minions, she depicts herself on the North Pole, being abandoned by penguins. There are no penguins on the North Pole.
"The Queen of England" in reality is not just Queen of England, as referred to by Scarlet and the Minions, and it's a regularly promoted misnomer in Hollywood that England is the only part of the UK that has a monarchy (with many people believing that "England" and "UK/Britain" are interchangeable terms). Queen Elizabeth II is Queen of Great Britain and Northern Ireland, which also encompasses Scotland and Wales. Wales formally united with England in 1536, Scotland's and England's crowns formally united in 1603 with a parliamentary union occurring in 1707. Ireland joined the Union in 1801, with the Irish Free State being established in 1921 and leaving only the Northern States maintaining membership of the UK since.
When Scarlet is reading the bedtime story, she says that stealing the crown would make her a princess, which does not make sense because she is attempting to steal the crown of the Queen, not a princess.
The Queen does not order the police to pursue Gru after he takes the crown from Scarlet.