Continuity mistake: Spot finds four other humanlike creatures and goes to them. Arlo is standing several feet in front of them. He begins to push some dirt by using his nose. A close-up then shows him using his nose to draw a circle around the five others but he is standing much too far away to be able to do this.
Continuity mistake: When the woman is eating the bread roll on the train, the end of the roll switches from uneaten to having bites taken out of it and back again.
Continuity mistake: After Brad gets the electric shock, his shirt is completely clean but few shots later he has some burn marks on it.
Continuity mistake: The getaway car changes from a Peugeot Partner (1996-2003) to a Citroen C3 Picasso (2013-2017). (01:35:30 - 01:36:05)
Continuity mistake: In the early scene, when Maura is talking to the man in the corner, that she thinks is homeless, she stands up and has a green bag on her shoulder. When she asks for the sunscreen back, there is no sign of her bag. Then it's back on her shoulder.
Plot hole: They have to invent Nitrotrinadium when they travel to the future because it was not invented yet, but was in the Russian drink in 2010, so should have already been available when they travel to the future.
Continuity mistake: When Jesse Eisenberg seeks shelter at John Leguizamo's house, John Leguizamo pulls a gun on him. Jesse Eisenberg grabs the gun from John Leguizamo and in the close up of this action it's a completely different gun. (00:40:55)
Revealing mistake: When Krampus walks toward Max after he yells at him to give him his family back, wires are controlling Krampus' arm. (01:24:30)
Continuity mistake: When Shaggy and Scooby are approaching the Demon as he eats, it is shown that he is eating from a platter of hamburgers and french fries. Scooby and Shaggy bump into his table, knocking the food all on the floor. When Shaggy and Scooby quickly put all of the food back on the table, it now has french fries and hot dogs.
Visible crew/equipment: When Bryson and Katz are getting onto the Greyhound bus, a guy in a fluorescent jacket can be seen holding traffic up in the distance whilst the scene is filmed.
Continuity mistake: When Bianca takes Wes to the "thinking rock", as they talk and her hands are in her lap, her hair moves from over her left ear to behind her left ear and back, twice.
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: First meeting with Lazarus; the pastor sits down, his wife is just about to, and Verdean's assistant has placed her bag on the table. Next shot, pastor and wife seated, but Miss Jensen is still just only then approaching the chair and putting the bag down. (00:08:25)
Continuity mistake: When Joy is talking to the gentleman in the cowboy hat when in her room in Texas, the strings on his string tie change from on the left of his button to one string on each side of the button and back again.
Continuity mistake: The guys pass 3 women walking on the sidewalk just before the Ciel pulls up at the hotel to visit Travis. 2 of these women are in the next shot where Vinnie and Eric get out of the car and walk into the hotel. The tall one in a floral dress walks away from the camera and stands to one side, and the blonde wearing the black top and spotted shorts is chatting in the background. (01:06:05 - 01:06:55)
Continuity mistake: Just after the unanswered call from Pandora, Alex is sucking on the glasses' arm, which becomes her finger in the following shot, and the arm again right after.
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)
Other mistake: The town is Mt Barker. The red and blue ribbons on the sheep pen say Mt Baker.