Even some of the best movies can have glaring mistakes in them, and thanks to a few eagle eyed viewers you’ll never be able to watch your favorite movie again without noticing that one scene where someone clearly did not do their job.

In You’ve Got Mail, Tom Hanks put an olive in his father’s martini.

Then somehow puts the exact same olive in there again.

Elsa’s hair does some amazing morphing through her arm during this musical number in Frozen.

There’s a scene in She’s All That where Taylor gets a tattoo on her back.

But later at her prom the tattoo magically vanished.

Somehow it’s raining in one spot on Tombstone, but mere feet away there’s no rain whatsoever.

In Pretty Woman, Julia Roberts is enjoying a croissant in her bathrobe, then in the next scene the croissant has turned into a pancake.

No one noticed this hand popping out during the raptor scene in Jurassic Park.

Dallas Buyers Club takes place in 1985, but there’s a poster for a 2011 Lamborghini Aventador on the wall behind Matthew McConaughey

This extra in North by Northwest clearly does not like loud sounds.

You can see Christopher Walken’s real teeth under his fake teeth in Sleepy Hollow.

Harry Potter was said to have had green eyes just like his mother, but in Harry Potter and the Deathly Hallows, she has brown eyes.

That is some very advanced technology in Gladiator, considering the time period.

In Jaws, everyone is terrified as they clear the beach from a shark attack, except for one guy who’s having the time of his life.