In a behind-the-scenes featurette, several Pixar team members explain how they created Ian and Barley's late father, who's resurrected for one final day with his sons — but who only materializes from the waist down, thanks to a spell gone awry.

The family journey that ultimately made it onto the big screen is pure Pixar wizardry: a little funny, a little cute, a little weird, and a lot emotional.