It's a well known fact that Pixar loves to sneak in little nods to their other films and inside jokes in their movies, but the sheer volume of Easter eggs is baffling. References to the team's old classroom, character cameos, and repeating voice actors are just some of the many fun nuggets hidden in the animated movies. YouTube channel Space Penguin took the time to point out 150 Easter eggs—but that's not even all of them. What did Space Penguin miss?