Continuity mistake: When they jump in the pool, they drop the guitar. When they jump out their guitar is no longer in the pool.
Factual error: Jack Sparrow says he loves the French because "they invented mayonnaise." The film is set in the 1750s. The egg-based sauce known as mayonnaise was developed in the early 1800s. The Oxford English Dictionary says the word dates from 1815.
Continuity mistake: At the start of the song "Chillin' Like a Villain," Evie's shoes go from having high block heels to entirely different shorter wedge heels during the song. After the song, it's back to the high block heels. (00:38:20 - 00:39:40)
Continuity mistake: Gene and High Five are using costumes to hide, and Gene's costume leaves a spike in his face, but when they put the costumes down and run around the corner there is nothing on his face.
Continuity mistake: When the bald soldier gets into the cage of the apes, the amount of mud on his face changes between shots.
Continuity mistake: Laureline is not wearing a safety harness when talking to Valerian, but it appears and disappears several times as the shot cuts back and forth to Valerian. Laureline then puts on the safety harness she was already wearing.
Continuity mistake: During the opening scene with Ego and Quill's mother, they run into the woods behind the Dairy Queen, and mom is wearing boots with fur trim. When they get to where the Ego's plant is in the ground, she is suddenly wearing sandals.
Other mistake: Despite the up-to-date equipment used in the movie, Kate carries an old style film camera rather than a dslr. It was obviously so that she could develop the film later to realise her 'love'. At any rate, when going through her bag, she finds a roll of 35mm film to develop, but when the film is laid out on the light table for her to examine with a loupe, the film shown there is not 35mm. I think it was 126mm.
Continuity mistake: Gargamel finds out of the smurf he captured is Smurfette. She grabs the bars of the cage, but the position of the door hinges changes, switching from her right to her left, back and forth. (00:13:35)
Continuity mistake: Batman plans to put the Joker in the phantom zone, and Barbara says no. She is still right in front of the SUV, but in the next shot, she is suddenly standing more forwards.
Plot hole: After Rita kills Billy, why didn't any of the other rangers do something to help him? They could have very easily done CPR on him or at least called for an ambulance.
Suggested correction: (1) they did...they took him to Zordon. (2) These are high school kids. Have you ever seen any slasher flick before? Not every HS kid knows CPR.
Every high school lifeguard that ever existed.
Suggested correction: They may have not been in range with cellphone towers to get a good enough signal. Also, they had superpowers including super strength so doing CPR on Billy would have been very dangerous and would have probably hurt him even more.
Continuity mistake: When Noah and Adam are talking and Noah is playing with his fishing pole he is reeling it in. It cuts to a close up as he talks about his mother taking him to Canada and suddenly his left arm is pulled back a bit and he's holding the pole much closer to his body. (00:08:20)
Plot hole: The world depicted features magic, an evil overlord who 2,000 years before tried to conquer the world, and several races. Despite these HUGE differences with our world, everything turns out of the same as our world, with nations as they are now, and a casual mention of the Alamo and "Mexicans still getting shit" for it. So our current history has not been altered a single bit by wizards, dragons and super-strong races roaming the Earth. Fine. In this ungodly implausible context, orcs live with humans in cities that mirror ours; humans and elves don't trust them, but still they live in towns with them, they go to schools, run businesses, half of the NFL is formed by orcs. Even the movie Shrek exists! And yet, at the end of the movie Nick Jakoby becomes the first Orkish police officer in the USA! There is just no way a society like this, mirroring closely our own and with orcs that existed as long as humans did, can exist with no orc ever been part of law enforcement.
Factual error: "Colonel" Roderick has incorrect rank insignia on his collar. Looks like Sergeant First Class (three above, two below).
Factual error: The film informs us the gravity on Neptune's moon Triton is less than 8% of Earth's. But the whole physics of the rocks and his movement on the surface do not reflect that. The actual surface is frozen nitrogen. The difficulty he has in moving around is not well correlated by him only weighing 7kg. Https://www.imdb.com/title/tt5361488/.
Factual error: A group of people are traveling in a pickup truck escaping earthquakes and volcanic eruptions. They come across a mist that they identify as sulphur dioxide, mainly by its smell and effects on people. Then the plastic interior of the car starts to melt, and they attribute it to the sulphur dioxide. Sulphur dioxide can attack plastics and rubber, but only in its liquid form. It turns gaseous at -10° C. After that it is a gas. So the melting of plastic is not correct at ambient temperature.
Factual error: Engine 463's firebox is seen in a close-up, revealing a cast in date mark of 1914. The caption near the start says it's set in 1892. (02:02:00)
Continuity mistake: Roland crumbles up Jake's drawing and stuffs it in his jacket, but when he takes it out again, it's neatly folded.
Continuity mistake: Sara recovers the artifact and gets on the boat. She removes the deep-dive helmet and the oxygen tank. The villain is looking at her through his binoculars, she hasn't moved, but the equipment she took off and dropped on the deck has vanished. (00:03:00)
Continuity mistake: Throughout the scene at Stukey's, when Helen Mirren is chatting the Syrians' ears off her elbow sticks out of the window at variable length between shots. (00:05:45)