Continuity mistake: When the troop is flying in the helicopter at the start of the movie, Epps is not wearing sunglasses. When it cuts back to him, he is, then again it cuts away and back several times and you can see an indentation on the side of his head where the Oakley sunglasses were.
Continuity mistake: In the opening attack scene on Soccent AFB, Colonel Sharp pulls an axe off the wall to literally cut the server hard lines. This axe was not on the wall in the earlier dialogue between Colonel Sharp and the one who was telling him about the unidentified aircraft. (00:07:40)
Factual error: When briefing the Secretary of Defence, Banacheck refers to NASA/JPL having lost the Beagle 2 probe on Mars. Beagle 2 was part of the European Space Agency Mars Express mission. NASA/JPL were not involved. Beagle 2 was also not a rover-type mission, as portrayed in the film, but a static scientific lander.Tailkinker
Continuity mistake: When the SUVs arrive at the Hoover Dam, the lead car pulls up to the curb and the doors open directly in front of the first elevator tower (there are four, which are seen in overhead shots), on its right, with the two Nevada intake towers well ahead of the SUV, on its left. Next close-up, however, as Sam exits the SUV the vehicle is now parked farther up the road, directly in front of the Nevada intake towers to its left and closer to the second elevator tower. Note the yellow pedestrian walkway markings (leading to the Nevada intake towers) the SUV is parked on in the second shot. (01:34:25)Super Grover
Continuity mistake: When Sam grabs his mom's pink bike, there is nothing in the white basket at the handlebars as he flees from Bumblebee. However, at the start of the shot just before the tire hits the broken concrete, a square pink pillow suddenly appears in the basket, before flying out as Sam flips over. (00:48:10)Super Grover
Factual error: When Barricade interrogates Sam, he asks him if he is "Username ladiesman217" and "Where is eBay item 21153". However, it is impossible for an item sold so recently to be that item number. If you sell an item now, it would be over item number 200000000000.
Factual error: The call sign used for the AC-130 is "Spooky" which is the AC-130U nickname. The plane in the scene is an AC-130H "Spectre" as evidenced by the "cheeks" on the plane and the logo visible in the shot where the aircraft rolls in. No gunship would fly using the nickname of another type of aircraft as its callsign, too much potential for confusion.
Continuity mistake: In the scene where Sam and Mikaela are looking at Bumblebee's engine, both of Bumblebee's doors are open when Mikaela starts walking away. Sam jumps in the car and pleads with it to start, and the shot changes to side view from passenger side of him trying to start. Here both doors are open as well. But when the shot changes to Bumblebee starting up and Sam jumps out to close the hood, the passenger door is suddenly closed.
Continuity mistake: When Optimus Prime first arrives in Mission City, he knocks over a few garbage cans, and a few pieces of paper gets stuck on the grill of the truck. But in the next shot, the pieces of paper are gone. This is not because he slowed down, because the grille is out of shot for less time then it would take paper to fall off. Not only that, but the air blowing at the paper would make sure it sticks on. (02:00:00)Friso94
Deliberate mistake: At the corner of the roof, Sam clutches the statue as he protects the All Spark from Megatron, who then destroys the statue causing Sam to fall. In the overhead shot of Sam falling, as the chopper flies by, we see the All Spark leave Sam's grip and actually fall behind him. Yet, in the next close-up the All Spark is safely held in Sam's arm again. (02:06:50)Super Grover
Continuity mistake: At Bobbie B's, when Sam first opens Bumblebee's driver-side door, the gas pump's white steel guardrail is directly behind him, aligned with the driver's seat, but when all the windows shatter, Bumblebee's front fender is aligned with the guardrail, though Bumblebee has not moved. Same goes for the VW Beetle beside the Autobot. (00:14:00 - 00:15:10)Super Grover
Continuity mistake: When Ron and Sam, followed by Bumblebee, make the U-turn in front of Bobby B's and then park, the spinning 'Bobby B. sez...let's talk deals' sign is to the left of the three vintage gas pumps, near the clown. When Bobby B. puts his arm around Sam's shoulder and says, "Sam, your first enchilada of freedom..." the spinning sign is now on the other side of the pumps, where there wasn't a spinning sign previously. (00:12:10 - 00:13:15)Super Grover
Continuity mistake: When Ron and Sam park in front of Bobby B's, there are three cars parked in front of the three pumps - a white vinyl top, a wagon, and a red car. When Sam says, "You said half a car, not half a piece of crap, Dad," the red car has been replaced with an old blue Plymouth, specifically for the "50-year-old virgin" joke, because the red car is back in following shots. (00:12:20)Super Grover