Revealing mistake: During the live stream, the second punch that the president receives misses him. However, he reacts to the punch. (01:15:50)
Revealing mistake: As Pee Wee rides in his little red car he stands up in it going by the breakfast bar in the house. As he sits after filling the plate, the camera shakes along with the car, showing the car and camera are mounted on the same rig.
Revealing mistake: Just after Sang-hwa and the baseball team seal the doors, it cuts to a man in a checkered shirt clinging onto a set of chairs, getting attacked by a zombie. In the closer shot of the zombie biting onto the man's neck, for a brief moment, a blood pack can be seen just above the black T-shirt he is wearing under the checkered shirt. (00:45:43)
Revealing mistake: When Branch first takes Poppy into his bunker, and down into his storeroom, the lever that he uses isn't there, but when the shot goes to Poppy, and then returns to Branch, the lever is magically there.
Revealing mistake: Set in Pittsburgh, PA, scenes were obviously filmed out of sequence. Many scenes were "out of sync" with the snowfall, whether in progress or amount (if any) already accumulated. For example, there was no snow downtown, but views from the helicopter showed snow-cover around the nearby parkway (Route 376). In another scene, it was snowing when Ryan turned his Jeep into a downtown road that was covered with at least one inch of snow; switching to a "live" newscast, the sun was shining outside.
Revealing mistake: When Gabby and Fin are hanging off the building in Las Vegas, you can see that Gabby isn't holding on to anything in some close-up shots. (00:11:47)
Revealing mistake: When James jumps off the SUV about to crash through the parapet, Ice Cube rolling on the floor looks 20 pounds lighter - that, or it's just the stunt double. (00:09:30)
Revealing mistake: The "snow" is obviously fake and it is largely absent on the left third of the screen and, to a lesser extent, the right side. Although it apparently recently started snowing, the snow was not melting when it hit the pavement, which would mean it was cold enough for snow to also "stick" onto metal vehicles (but did not) and the car pulling into the alley should have left tire tracks. At various spots throughout the movie, "snowfall" is spotty and irregular. (00:26:48)
Revealing mistake: They jump out the office building and the CIA is shooting at the tan Ford Explorer. When the bullets hit the drivers door and other parts they are not making any marks/bullet holes, you can see they are fireworks and not bullets.
Revealing mistake: In the opening scenes, we see a very pregnant Draka reclining on a bed of animal hides as Durotan watches over her. In the extreme closeup, we see Draka twitch her lips, and her small tusks flex from side-to-side with her lips, instead of remaining firmly aligned with her jaw as they should.
Revealing mistake: The subway station is identified by its internal signs as "Central" station, but as the Suicide Squad enters its exterior entrance, the sign above declares that it is "Bay St." station. Bay Street Station in Toronto is frequently used for movie shoots, as it has a complete lower platform which has been out of service for decades (https://en.wikipedia.org/wiki/Bay_ (TTC) #Lower_Bay).
Revealing mistake: When Fujiwara is about to have sex with Hideko, there is a shot with Hideko in the foreground of the shot, kneeling on her hands and knees and Fujiwara behind her kneeling down on his knees whilst holding onto her with his left arm. Fujiwara is shown removing his trousers using only his right hand, but it is apparent that he is just miming the actions of removing his trousers before throwing them on the floor. Attempting to remove a pair of trousers with only one hand would be extremely difficult and if he is kneeling on the floor, it would require him to lower the trousers down to his knees, lift his knees off the ground, pull the trousers around the knees and then fully pull them off his lower legs. While not impossible, this would be very hard to do, but he manages to do this in just a few seconds with almost little to no struggle. (02:02:53)
Revealing mistake: When the Creature is telling Louis the "Bat Story," the Creature is holding a burning torch in its right hand against a wholly-dark background. It becomes apparent that the shots of the creature are actually Dutch Angle shots (the angle of the camera is rotated about 45°), because the smoke from the torch is not rising straight upwards; rather, the smoke is rising at a 45° angle toward the upper left corner of the screen.
Revealing mistake: When doing the blindfold dare, the same clip of them swerving between cars is used 2 or 3 times. (00:44:10)
Revealing mistake: When Lockhart slices his cast open, his missing tooth is just cosmetically blackened. (01:47:00)
Revealing mistake: Despite Sigourney Weaver supposedly having had her fingers cut off if you watch her when she's in her straitjacket you can see her fingers moving around.
Revealing mistake: In the Gatling Gun scene when the camera cuts to a short couple frame shot showing a closeup on the .45-70 Government ammunition casings on the ground that are falling from the gun, the casings are star crimped. Star crimped casings indicate blank ammunition. Standard ammunition isn't possible with star crimping. The size and casing shape indicates .45-70 Gov which was popular in these guns at this time. (01:46:40)