Visible crew/equipment: At the rodeo, just as the tornado comes, there is a shot panning across some equipment that ends with the guy shouting into the microphone for people to evacuate. As it's panning across the equipment, it's casting shadows on it.
Factual error: Film is supposedly showing Hollywood circa 2010, but in a shot of Hollywood Blvd, the Dolby Theatre sign is visible. However, Dolby didn't get naming rights to the former Kodak Theatre until 2012. Also of note, a few seconds later, another shot of Hollywood Blvd is shown, this time with the Kodak lettering correctly visible. (00:01:00)
Continuity mistake: When Anita Caprioli and Pasquale Petrolo are talking by her car, the car door hits Lillo. The two awkwardly chat for a while; during the conversation, their hands change position a few times between shots. (00:51:30)
Continuity mistake: At the fancy dinner at the beginning of the movie, Frida uses the titular line ("Blink twice if I am in danger") on Kyle MacLachlan. Rich slightly tips over his glasses as Slater waves his hand. In the next shot, Slater is still waving, but Rich's position is wildly different; his glasses are completely off and in fact below his waistline. (00:09:20)
Continuity mistake: At the gas station, Thelma and Ben are talking to random people Thelma thinks she knows. Meanwhile, her family is on the way there. The sun is going down in this sequence and it's noticeably getting darker. Before they run behind the building, it's suddenly lighter outside and gets darker again.
Factual error: During the scene inside the submarine, you see a Commander (O5) giving orders to a captain (O6). This would never be a thing on any vessel. You would have a Commander as a Commanding Officer on a submarine, but not having a Captain working for the Commander.
Audio problem: When inside Washington D.C. and the AH-64 is firing its gun, the sound is completely wrong. In the movie, it sounds like a laser gun, and in reality, it's a M230 chain gun, which sounds different.
Continuity mistake: After the scene with the elevator bringing up the bricks, Garrett Morris and Jane Curtin are having a chat, smoking together. Garrett asks, "You wonder exactly what it is you are doing here?" As he asks that, Kim Matula is leaning her head against her hand. The shot changes and it is dangling off the railing. (00:40:00)
Plot hole: Given contestants were carefully checked for steroids at show time, mainly by urine tests, it seems unlikely Jackie would have been allowed to compete once her steroid use was discovered.
Suggested correction: Not at the amateur level, and not during the time period depicted in the movie.
Continuity mistake: During the "One Short Day" sequence, the Wizomania choir arrives featuring Kristin Chenoweth (on the left) singing back to back with Idina Menzel. When Kristin hits the high key, Idina suddenly disappears between instant cuts.
Continuity mistake: Kraven casually sniffs a couple and ruins their relationship. He then sits down with his brother; Fred Hechinger's hand keeps changing position between shots, holding a fork or not.
Factual error: Near the end of the film, each time Harker pulls the trigger to shoot, the magazine doesn't spin to load a new bullet. This is especially noticeable when she tries to shoot the doll.
Factual error: The insignia on Staff Sgt. Branson's uniform is incorrect. The insignia on her camouflage blouse is for a US Army Staff Sgt, not a US Air Force Staff Sgt. (00:03:58)
Character mistake: When Jodie and Colt are in her trailer, discussing what should be done next, Jodie suggests Colt needs to cross the border. But they are in Australia, which only borders the sea.
Other mistake: Irs stabbed Richard completely through his face and shot him in the torso. Although he fell in the lake, he is later shown on the shore and he is not bleeding. Head wounds normally bleed like crazy. Since he is wounded in two places, he should have drowned or bled out from swimming to shore. (01:19:51 - 01:25:08)
Continuity mistake: When Samira and Eric arrive at the jazz club, Eric sits Samira down and then goes outside. A drum kit can be seen with "East Harlem Best" written on the front. Right after he leaves and right before Samira stands up to plug her iPod in, a bar stool has suddenly appeared in front of the drum kit. Eric will move this same bar stool in front of the drum kit himself again later on in the scene.
Continuity mistake: When the milkman is drinking milk in the bar and talking to the Tony the Tiger actor, the amount of milk in his glass changes with the different camera angles. It goes from 2/3 full to mostly full to half full back to mostly full. (00:54:56 - 00:55:45)
Visible crew/equipment: When the 6 main characters open the hatch to the sewer, there appears to be a crew member helping them open it. There is only 6 of them in the scene. But, there is a seventh person at the top who looks to be wearing a m95 mask. This is also in the opening scene of the first trailer.
Continuity mistake: During the cartoon short that opens the movie, Joker, on his way to the stage, breaks the arm of a man in the corridor. In the background, slightly ahead of him in his path, is a poster for Charlie Chaplin's Modern Times. The camera angle changes as Shadow Joker turns around; he is supposed to be in the same spot, but the poster is way behind him; Joker is now standing next to the Pal Joey poster.
Factual error: Someone shouts "jobsworth" at a London Underground official. This term is first recorded in 1970. The film is set in 1940.