When Krakatoa blew in 1883, it ejected some 5 cubic miles of debris into the atmosphere, dropping the average global temperature by as much as 1.2 degrees Celcius for the next year. It has been postulated that should the Yellowstone supervolcano erupt, it would exceed the last eruption, which ejected 240 cubic miles into the atmosphere. In the 28 days that pass before the denizens of the arks are permitted to go outside, the ash and debris from not only Yellowstone, but the scores of volcanoes that erupted almost simultaneously would have blocked the skies world wide. Not only would the citizens have been forbidden to emerge from their cocoons, but satellite views of Africa would have been impossible, and whatever crops survived the earthquakes and lava would have already started to perish.

When Sam is supposedly dead, it shows him walking into a bright light while talking to Autobots. It shows Sam's pinky and ring finger wrapped up in a bandage, but a couple of seconds later the bandage has changed to wrapping Sam's middle and ring fingers.

After Wolverine arrives at 3 Mile Island he approaches through a thick fog. Above him are a series of conveyor belts that are used at a coal power plant, not a nuclear plant such as 3 Mile Island. The belts are unique to coal mines and coal power plants, and would not be found at a nuclear power plant. The filmmakers obviously couldn't film on the site of a nuclear plant, so filmed on a coal plant to fill in.

When they fall off the house and can't get back on it Russell isn't wearing a backpack. After they decide to walk the house to the falls, Russel has his backpack.

Bella goes to Italy to save Edward. Alice drops Bella off - when Bella gets out of the car to ask where Edward will be, first you see Bella in front of the car door, then she is suddenly behind the car door.

Towards the end of the movie, the G.I. Joes head for the north pole to rescue Duke. In several of the scenes outside the base you can see mountains in the background but there are no mountains anywhere near the north pole - it is just ice.

When Katie goes downstairs in the scene at the end, the alarm light (green) is off. When she comes up with the blood on her shirt the alarm light is on.

When Max is going to get K.W. just prior to the Dirt Clod War, his hood is down. When he returns to Carol and Douglas, (just prior to being hit with a dirt clod) his hood is up.

In the scene where Vetra is taken to examine the body of the deceased pope, the corpse is exposed after the marble slab and the lid of the casket is removed. In reality, papal funerary protocol requires the body to be triple-sealed. It is first placed in a coffin of cypress wood (to symbolise humility), and is then hermetically sealed in a zinc coffin to slow down decomposition. Finally, the zinc coffin is then placed inside of an oak coffin before being interred beneath the marble slab.

Gallaxhar scans the galaxy to find the missing quantonium. The scanner zooms in on earth, showing it to be very close to the center of the galaxy. Earth is actually nowhere near the center of the galaxy; it's located much closer to the outer edge.