20 Things You Somehow Missed In Toy Story
4. "Julie Macbarfle Has Cooties!"
This is very difficult to spot on earlier home video releases, though much easier to notice on the Blu-ray and especially the more recent 4K UHD.
The bag which Sid uses to bring Woody, Buzz, and the aliens home from Pizza Planet has a scrawling on the side which reads, "Julie Macbarfle has cooties!"
This is a reference to Julie M. McDonald, who worked on the film as a camera and editorial manager, and who asked the animators to include a reference to her in the film somewhere.
Whether this is quite what she had in mind, we'll probably never know.