#1 In Up, all of the possessions on Ellie's side of the bed are round, whereas everything on Carl's side is square — the same shapes as their character design.
#2 Prior to getting hit by lightning, Wall-E only has one bar of battery remaining. After getting struck he's fully charged.
#3 In Toy Story, the carpet in Sid's house looks eerily similar to the carpet that lines the hallways of the hotel from The Shining.
#4 Pixar must be pretty big fans of The Shining, because a painting of the movie's infamous twins can be seen in Coco.
#5 The first Toy Story also features a quick reference to the iconic chestburster scene from Alien.
#6 And another movie reference occurs in Toy Story 2, when Rex appears in the reflection of a car mirror, similar to the T-Rex from Jurassic Park.
#7 In Monsters, Inc., Sully's chair has a hole in it so he can sit comfortably without resting on his tail.
#8 Keeping up the attention to detail, the break room of the Monsters, Inc. factory features different sized coffee cups to accommodate all the different monsters.
#9 In The Incredibles, the phone number on Mirage's business card spells "SUPRHRO" when typed out on a phone's keypad.
#10 If you pay close attention during the opening credits of Toy Story 2, you can spot the famous Pixar lamp amongst the stars.
#11 When we first see Anton Ego's office in Ratatouille it resembles a coffin, and his typewriter looks like a skull.
#12 In Cars, one of Lightning McQueen's rivals is a vehicle with the number 84 and an Apple logo. Apple co-founder Steve Jobs was Pixar's CEO, and 1984 was the year Apple released their first personal computer.
#13 Another Apple reference can be found in Monsters, Inc. when Mike picks up a magazine containing an advert with the slogan "scare differently", a parody of Apple's "think differently" slogan.
#14 In Toy Story, a tool box inscribed with the word "Binford" can be seen. Binford Tools is a fictional company from Home Improvement, the sitcom that launched the career of Buzz Lightyear's voice actor, Tim Allen.
#15 The animators of Finding Dory deserve some recognition for somehow managing to give a receding hairline to a fish.
#16 The names on the boots of Woody and Buzz clearly show that Andy's handwriting has improved as he's aged.