Just like everyone else, filmmakers can make mistakes, too. Often those oversights are hard to notice on the first watch, so it might be a good idea for directors to go through their work with a fine-tooth comb a couple more times.

To get you started, Newsguide put together a list of the most glaring mistakes from famous movies.

The Hobbit and The Lord of the Rings

10+ unbelievably obvious movie mistakes you most likely missed

In ’The Hobbit,’ Legolas has dreamy blue eyes, but in the ’Lord of the Rings’ trilogy they were almost black.

10+ unbelievably obvious movie mistakes you most likely missed

In ’The Lord of the Rings: The Return of the King’ one of the staircases suddenly disappears along with Frodo.

Harry Potter

10+ unbelievably obvious movie mistakes you most likely missed