Movie-lovers are highly skilled at picking out mistakes and inconsistencies in the films they watch. Every tiny change in a character’s appearance or the position of an object is usually noticed by some sharp-eyed observer as soon as a new movie appears in theatres.

There are some mistakes, however, which are subtle enough for many people to overlook. Here are 10 which you probably never noticed before, but which become truly unforgivable as soon as you see them. You’ll never watch these movies in the same way again!

Twilight

18 Unforgivable Movie Mistakes You Probably Never Noticed
If you watch a movie carefully, you can often see the reflection of the camera in a car window. This is actually a common mistake which many directors fail to pick up on. It’s certainly visible here in Twilight.

Inglourious Basterds

18 Unforgivable Movie Mistakes You Probably Never Noticed
The chest insignia of the German officer at one point disappears and then reappears in a later scene.

Avatar

18 Unforgivable Movie Mistakes You Probably Never Noticed
When Jake opens the capsule, there is no sign of the wheelchair. A moment later it appears out of thin air next to him.

Terminator 2: Judgement Day

18 Unforgivable Movie Mistakes You Probably Never Noticed

Early in the film, the Terminator shields John against the bullets from the T-1000 with his own body, receiving a whole cartridge in his back. His coat is covered in bullet holes. But a few moments later it looks good as new.

18 Unforgivable Movie Mistakes You Probably Never Noticed
When the truck which the T-1000 is driving in his chase with John Connor falls over the bridge, its front windows fall out. In the next shot they’re there again.

The Avengers

18 Unforgivable Movie Mistakes You Probably Never Noticed
In the scene where Thor destroys everything around him, the bumper of one car is miraculously restored to good condition.

Dallas Buyers Club

18 Unforgivable Movie Mistakes You Probably Never Noticed
This film is set in 1985, but in one scene we see a poster of a Lamborghini Aventador on a wall. This car was only released in 2011.

Titanic

18 Unforgivable Movie Mistakes You Probably Never Noticed
It seems there were two Titanics. Otherwise, how can we explain the changing appearance of the deck?

Pirates of the Caribbean: The Curse of the Black Pearl

18 Unforgivable Movie Mistakes You Probably Never Noticed
It seems there were a few pirates in Jack Sparrow’s gang who were fans of modern-day fashion.

Terminator 3: Rise of the Machines

18 Unforgivable Movie Mistakes You Probably Never Noticed
At one point, John and Kate fly off in a small white plane. The number on the side first initially appears to be N3035C. Once they’ve landed, the number changes to N3973F. But then when they land the first number has reappeared.
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